Author Topic: New Raven build -- advice sought  (Read 119929 times)

Danneaux

  • Administrator
  • Hero Member
  • *****
  • Posts: 8281
  • reisen statt rasen
Re: New Raven build -- advice sought
« Reply #75 on: November 18, 2015, 08:36:31 PM »
Yep; you both are correct, but I see the persistence of other figures on third-party websites. For example:
https://www.bikeonlineshop.net/rigida/andra-30-rim-559-black
https://www.bikeonlineshop.net/rigida/andra-40-rim-559-black

SJS Cycles lists the Rohloff-drilled Andra 30 as weighing 735g:
http://www.sjscycles.co.uk/rigida-andra-30-26-559-mtb-rim-rohloff-drilling-black-32-hole-prod13565/?geoc=us

Still checking, as the third-party figures represent quite a discrepancy between Andra 30 and 40, as you noted (thanks!  :) ).

All the best,

Dan.
« Last Edit: November 18, 2015, 08:45:32 PM by Danneaux »

Andre Jute

  • Hero Member
  • *****
  • Posts: 4128
Re: New Raven build -- advice sought
« Reply #76 on: November 18, 2015, 09:11:20 PM »
The inside width of your rim across the bead retainer must be no narrower than 2.5x the width of the widest tyre you want to fit but there is benefit in going wider still.

Andre, I think you meant. The inside width of your rim across the bead retainer must be no narrower than 0.4x the width of the widest tyre you want to fit , or in other words, the width of the widest tyre you want to fit must be no wider than 2.5x the inside width of your rim across the bead retainer, but there is benefit in going wider still.

You're so right, MacSpud. I must've been up all night working, wiped when I wrote that. I've changed the original. Thanks!
« Last Edit: November 23, 2015, 04:53:32 PM by Andre Jute »

macspud

  • Hero Member
  • *****
  • Posts: 730
Re: New Raven build -- advice sought
« Reply #77 on: November 19, 2015, 09:52:00 PM »
The inside width of your rim across the bead retainer must be no narrower than 2.5x the width of the widest tyre you want to fit but there is benefit in going wider still.

Andre, I think you meant. The inside width of your rim across the bead retainer must be no narrower than 0.4x the width of the widest tyre you want to fit , or in other words, the width of the widest tyre you want to fit must be no wider than 2.5x the inside width of your rim across the bead retainer, but there is benefit in going wider still.

You're so right, MacSpud. I must've been up all night working, wiped when I wrote that. I've change the original. Thanks!

Andre,

I totally agree with you that tyre width to inner rim width should be kept within 2.5x, I think it would be preferable to keep it to somewhere around 2x.

I use Schwalbe Big Apple liteskins 55-559 (26 x 2.15) on an Andra 30 rim. I went for the Big Apple liteskins on your recommendation and love them. The tire width is 2.9x the inner rim width so the cornering gettings a bit squirley when cornering hard at the pressure I'd prefer to use them at, Some time in the distant future when I've worn through The Andra 30s, I'll try some Andra 40s.

djd828

  • Jr. Member
  • **
  • Posts: 92
Re: New Raven build -- advice sought
« Reply #78 on: November 23, 2015, 02:32:19 PM »
Good info on the rims as I am now getting ready to start on the wheels....though getting the hub from Germany is going to take longer than I anticipated.  I have been working with the Velocity folks and it is looking like I will be having them build up my wheels using their new Cliffhanger rims.  I will most likely go with some Marathon Plus or Mondial 2.0 tires.

djd828

  • Jr. Member
  • **
  • Posts: 92
Re: New Raven build -- advice sought
« Reply #79 on: December 12, 2015, 03:11:27 PM »
I haven't posted in a while because I have been patiently waiting for my Rohloff to arrive from Germany. It took almost a month mostly due to being held up in Chicago customs for 11 days. I picked it up at the post office this morning and will be shipping it directly to Velocity for the wheel build. I just hope it gets this much mileage when I am finally able to put it on the bike.

Which leads to my new dilemma.  Seems that SJC is backordered on the Raven frame until early February and I have most of the other parts ready to complete the build.  I had the Raven and the Patria Terra as my top choices and now I may consider making this an all German affair with the Rohloff, Son and Patria.  Or I just may practice a little patience and wait. I guess I will spend the rest of the weekend making my decision.

Update:  I just read Andre's blog concerning chain tensioning options and he made a compelling argument (indirectly) for considering the Patria...hmm.

Thanks again everyone for your help and if you want to weigh in on my current dilemma, feel free.

Dave

« Last Edit: December 12, 2015, 03:38:50 PM by djd828 »

mickeg

  • Hero Member
  • *****
  • Posts: 2801
Re: New Raven build -- advice sought
« Reply #80 on: December 12, 2015, 08:01:56 PM »
My Rohloff from Bike24 came straight to my door via US Postal Service, no delay and I was surprised that there was no customs duty on it. 

There was a duty on my Nomad frame of about 6 percent - plus $10 (USD) or something in that range.  Thus the surprise with no duty on the hub.

I really have no problem at all with the Thorn eccentric.

Write down the serial number before you ship the hub off.

RonS

  • Full Member
  • ***
  • Posts: 180
Re: New Raven build -- advice sought
« Reply #81 on: December 12, 2015, 08:15:29 PM »
Hi, Dave

From what little I could find on the 'net in English, it appears to me as though the Terra is more comparable to the Nomad, not the Raven. It is a seriously heavy (20kg, weighed by an owner on Crazyguyonabike) expedition bike. I also read that it is made with straight gauge, non heat treated tubing, although that info is just from a forum post, so may not be accurate. Take that into account when deciding which bike is better for your needs, and which is the better value.

The link on Andre's post didn't work for me, so I couldn't read the article, but, I believe he says that the eccentric BB is a wearable part. I think it's going to be a long while before my eccentric becomes unusable. There is a fair bit of leeway with the adjustment. The chain can get quite loose, so it is possible when making adjustments to just use the divots that may already exist in the eccentric. If and when the eccentric becomes unusable, the ex VAT price is only about £25. You could just order a spare with the frame.

I'm guessing it'll be a couple of weeks before your hubs make the trip to Michigan and return shod in those beautiful Velocity rims. That'll only leave a month before SJS has the frames in stock. You don't want to ride your nice shiny new bike until Springtime anyway, do you?

« Last Edit: December 12, 2015, 08:40:26 PM by RonS »

djd828

  • Jr. Member
  • **
  • Posts: 92
Re: New Raven build -- advice sought
« Reply #82 on: December 12, 2015, 08:49:08 PM »
Mick, mine came duty free as well and I was prepared for at least 3%.  With the great euro to dollar situation at the moment, the Patria is about $150 less when shipping is factored in.  I also like the fact It comes in a variety of colors. 

Ron, you can read Andre's post by going directly to his blog and then clicking on his bicycling category. It is a few posts down and is good reading.  It is not so much that the EBB is a wearable part, but the ease of adjusting the chain with the Rohloff specific drops that caught my attention.

Still, I will think about the pros and cons a bit more as I pack up the Rohloff and Son for their journey to Michigan. At least I don't have to worry about customs on this trip.

And if the winter is anything like today in Kentucky (70 degrees), I may be doing quite a bit of riding the next few months.

mickeg

  • Hero Member
  • *****
  • Posts: 2801
Re: New Raven build -- advice sought
« Reply #83 on: December 12, 2015, 10:51:45 PM »
I can't imagine wearing out an eccentric.  And, you do not have to adjust the chain that often.

Regarding riding in the near future, on the first graph the "departure" means variation from normal for that time of year.

http://apps.startribune.com/blogs/user_images/pauldouglas_1449705745_bell1.jpg

http://apps.startribune.com/blogs/user_images/pauldouglas_1449705760_bell2.jpg

Andre Jute

  • Hero Member
  • *****
  • Posts: 4128
Re: New Raven build -- advice sought
« Reply #84 on: December 13, 2015, 12:17:27 AM »
I don't want to knock the Patria, but I looked into the brand seriously some years ago. There was an unresolved problem of dangerous shimmy on fast descents with the bike fitted with the balloons the management claimed it was designed for; I didn't like the way the management dismissed customer complaints; this is something you will never see Thorn do. I bought the more expensive Utopia Kranich instead, though their crossframe designs is a taste one acquires. (I did, in a very big way. Admittedly, though, I bought a semi-custom bike only because I failed to find a reputable brazier who wanted to build a 3D small tube design I made, and the Kranich was the nearest thing I could find. The reason I didn't buy a Thorn is that I'm an artist and I can't bear to look at a welded bike every time I ride, a reason that used to find amazingly little sympathy here, though I bet Bill at least will give me a bearing.)

If the Raven is your number one choice, I reckon you should hold out for it. The actual delay, as George already pointed out, is likely to be a couple of weeks, determined by when your built wheels are returned.

My article on chain length adjustment methods is at http://coolmainpress.com/ajwriting/tuning-out-chain-stretch-on-internal-hub-bicycles-fixies-single-speed-and-derailleur-bikes-by-andre-jute/

mickeg

  • Hero Member
  • *****
  • Posts: 2801
Re: New Raven build -- advice sought
« Reply #85 on: December 13, 2015, 12:41:23 AM »
Mick, mine came duty free as well and I was prepared for at least 3%.  With the great euro to dollar situation at the moment, the Patria is about $150 less when shipping is factored in.  I also like the fact It comes in a variety of colors. 
...

Five years from now you won't remember which one cost more.  Buy the one you will want to own five years from now.

djd828

  • Jr. Member
  • **
  • Posts: 92
Re: New Raven build -- advice sought
« Reply #86 on: December 13, 2015, 01:24:30 AM »
Thanks Andre and Mick,

I am torn but I will think about it while the wheels ar being built. I do like both frames so I think I will be satisfied whichever way I go.

Andre, I looked at the Utopia but their website is less user friendly being only in German.  Their SilverMowe looks more traditional and appeals to me in a very good way but I am not sure how it compares to the Raven or Terra.  The top tube looks very thin but they claim it is a "round the world" bike. I like having options and appreciate everyone's experience and advice.

macspud

  • Hero Member
  • *****
  • Posts: 730
Re: New Raven build -- advice sought
« Reply #87 on: December 13, 2015, 11:28:16 AM »
The Utopia site google translates fairly well.


The reason I didn't buy a Thorn is that I'm an artist and I can't bear to look at a welded bike every time I ride, a reason that used to find amazingly little sympathy here, though I bet Bill at least will give me a bearing.)


Andre,
I see your Kranich is TIG brazed. I hadn't heard of TIG brazing until now whilst reading through the Utopia web site. I guess the brazing would originally have looked very similar to TIG welds (the stacked coins look), but being bronze they were able to be filled smooth easily. The TIG brazing is preferable to gas brazing as the heat is very localised so doesn't affect the tubing as much, having said that TIG welding though heating the tube more than TIG welding also keeps the heat fairly localised, but the weld material is stronger and more fatigue resistant than the braze material.
Maybe the answer to beautiful and very strong joint is to TIG weld and then TIG braze over the weld and file/linish to a smooth finish, more work but maybe worth the extra time and cost for a high end finish?

« Last Edit: December 13, 2015, 11:29:56 AM by macspud »

Andre Jute

  • Hero Member
  • *****
  • Posts: 4128
Re: New Raven build -- advice sought
« Reply #88 on: December 13, 2015, 01:59:44 PM »
The Utopia site google translates fairly well.

They had a few bits of English that I translated for the sake of clarity for others interested -- I recently gave a test ride on my Kranich to a woman from about a 100 miles away who found me on the net and came on a Sunday -- that they asked if they could have. I imagine they didn't ask for more because of the likely cost. But that was years ago, and things have probably moved on since. It's a small firm and one of the owners answers correspondence in perfectly serviceable (if not instruction-grade) English.

The reason I didn't buy a Thorn is that I'm an artist and I can't bear to look at a welded bike every time I ride, a reason that used to find amazingly little sympathy here, though I bet Bill at least will give me a hearing.)

Andre,
I see your Kranich is TIG brazed. I hadn't heard of TIG brazing until now whilst reading through the Utopia web site. I guess the brazing would originally have looked very similar to TIG welds (the stacked coins look), but being bronze they were able to be filled smooth easily. The TIG brazing is preferable to gas brazing as the heat is very localised so doesn't affect the tubing as much, having said that TIG welding though heating the tube more than TIG welding also keeps the heat fairly localised, but the weld material is stronger and more fatigue resistant than the braze material.
Maybe the answer to beautiful and very strong joint is to TIG weld and then TIG braze over the weld and file/linish to a smooth finish, more work but maybe worth the extra time and cost for a high end finish?

The Kranich is built on specially designed and drawn Columbus tubes, so it follows that Utopia specced it for the assembly method. I assume that with Columbus's assistance changing the tubes' metal spec to allow for TIG brazing is a relatively routine operation. Utopia is well used to working with outside specialists; an amazing number of components made by others and now generally for sale were first designed by Utopia for their own bikes, or were designed and made only because Utopia promised to give them cachet of adopting them. As an aside, the Rohloff hub gearbox was designed for offroad racing, mud pluggers, and Utopia was the first manufacturer to specify it as standard gearbox on tourers; that's why Bernd Rohloff turns up at their annual barbie and owner party ("sommerfest" in the photo captions) in the forest at Utopia HQ.

My particular Kranich, now seven years old, is built with specially developed lugs and plugs. Plugs are in effect an internal lug. Where there is no external lug, the standard brazing is of such a quality and finish that the tubes appear to be cast as one piece. See the photos at http://coolmainpress.com/AndreJute'sUtopiaKranich.pdf 

About this new-fangled TIG brazing... This change is necessitated because the Van Raam manufactory in The Netherlands has seen such a growth in their own designs (special adaptations for the handicapped) that they can no longer build the few Utopia bikes. Also, the old-fashioned braziers are no longer young -- see http://coolmainpress.com/ajwriting/cycling-history-personified-on-his-90th-birthday-my-bike-builder-is-honoured-by-volkswagen/ -- and are not being replaced by apprentices coming up, as in days of yore. I reckon my bike, on which the old-style lugged and brazed frame is as new, will see me out. But if I ever need a new frame, I'd first like to see this TIG brazing close up before I lash out on it. I went to Utopia because their Kranich (English: Crane, the bird) was the closest thing to a design in small diameter stainless tubes I made and failed to have built, and of course because of their reputation for obsessive perfection; they're not called "the Rolls-Royce of bikes" for nothing. (A master machinist who worked with me a lot said to me, "Those ›fifl‡° Germans are the Continental cousins of those ‹›fifl‡‡ Japanese you designed for last year." He meant truly obsessed with getting the job done just so, perfectum, no variation, no excuses.) Anyhow, the new framebuilders already have a twenty-year relationship with Utopia, as the phosphor coaters of their forks, so they know the sort of quality expected, and Utopia has further invested €150,000 in new machinery for the contractors, so they're wielding considerable influence. I have no doubt Utopia's new construction method will be pleasing to the eye and the touch, and be conscientiously developed to be as pleasing in operation as their reputation calls for.

I do like my lugs...

« Last Edit: December 13, 2015, 02:01:25 PM by Andre Jute »

Andre Jute

  • Hero Member
  • *****
  • Posts: 4128
Re: New Raven build -- advice sought
« Reply #89 on: December 13, 2015, 02:47:53 PM »
Andre, I looked at the Utopia but their website is less user friendly being only in German.  Their SilverMowe looks more traditional and appeals to me in a very good way but I am not sure how it compares to the Raven or Terra.  The top tube looks very thin but they claim it is a "round the world" bike. I like having options and appreciate everyone's experience and advice.

As I said, Utopia is a special taste. The SilberMowe (Silver Gull) is a throwback to the '60s roadbike doubling as a touring bike. The apparently thin top tube is merely apparent: that bike is specified for 160kg load, has been tested for it (standard Utopia practice -- they test everything). and has circumnavigations to its credit to prove it; in general, you may take it that German businessmen do not lie, exaggerate or bluster like Americans, or supply crap and hope for the best; they'd go to jail for many standard American business practices. But the Silbermowe is a bit too commonplace for Utopia customers (believe it or not, the very odd Kranich priesterrijwiel -- priest's bicycle, from the time when priests wore divided skirted ankle-length coats -- is one of their bestsellers, the bike they're famous for), so at the end of 2015 the SilberMowe will be withdrawn. Meanwhile, if it is your sort of bike (and yes, it is pretty much an equivalent to a Thorn Raven or a Patria Terra), it is a luxuriously equipped Rohloff bike with a plutocratic name on it (easily removed if you want to be stealthy) for 2200 Euro while the last few sell out. See http://www.utopia-velo.de/shop/sonderangebote/ They also have some Silbermowe frames but the sizes are limited and you have to pay the full price of nearly a thousand euro (menubar acrosss the top of their page>Shop> Ersatzteil>Rahmen>scroll down a fair way); the built bike with all that desirable trim is clearly the way to go.

I can understand why the SilberMowe doesn't sell. Your German burger of means and a certain age (too old to care what anyone else thinks) sees all these fabulously unique bikes with provenance going back decades and very desirable historical connections, and he doesn't even glance at the modest Silbermowe before he puts down his money. But, on the other hand, the SilberMowe has a reputation as a superior all-rounder in a style that doesn't attract attention, and with the attention, thieves. It seems likely to me that the efflorescence of the Utopia range is the worst enemy of the pristine, traditional, capable SilberMowe.

By way of illustration of how the rest of the Utopia range is the SilberMowe's worst enemy, rather than bikes from Patria or Thorn: All the same, regardless of the Silbermowe's exceptionally generous 160kg load rating, if I were buying a self-supported circumnavigation loaded tourer with side trips to the rougher parts of the world, I too might be tempted to bypass the perfectly suitable Silbermowe for the Kranich or the London, both even more capable, both equally or perhaps even better-proven, and therefore with a greater margin of safety.

The Thorn owners have in a concurrent thread been bemoaning some really good Thorn bikes that fell by the wayside, in part because there were too many other attractive bikes in the range, true until the recent rationalization of the range. It happens to any innovative manufacturer sooner or later, and then there are often bargains to be had, with the added incentive that they're likely to become classics because nobody wanted them when they were current...