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General Technical / Re: Shimano Ultegra Calipers on Audax Mk 3......
« Last post by Planet X on Today at 11:15:16 AM »Thanks for the reply PH, actually, I’m going to measure from crown bolt to mid rim and get an idea, as recommended.
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General Technical / Re: Shimano Ultegra Calipers on Audax Mk 3......
« Last post by PH on May 22, 2025, 09:48:21 PM »I don't think you want either. You definitely don't want direct mount, that requires a frame and fork with specific fittings, rather than the generic hole for a central bolt. I'm also almost certain you need a deep drop brake for the Audax frame, something like the Shimano 451, but you'll need someone with that model, or a phone call to SJS to confirm that.
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General Technical / Shimano Ultegra Calipers on Audax Mk 3......
« Last post by Planet X on May 22, 2025, 09:08:19 PM »Hi,
Can someone please clarify just what I'm looking for here please. I see two options on "Bike Discount.de",
https://www.bike-discount.de/en/shimano-ultegra-br-r8100-brake-caliper-set
or
https://www.bike-discount.de/en/shimano-ultegra-br-r8110-direct-mount-brake-caliper-set-1
basically, the r8100 or r8110's?
Just a tad unsure what to order.
Cheers.
Can someone please clarify just what I'm looking for here please. I see two options on "Bike Discount.de",
https://www.bike-discount.de/en/shimano-ultegra-br-r8100-brake-caliper-set
or
https://www.bike-discount.de/en/shimano-ultegra-br-r8110-direct-mount-brake-caliper-set-1
basically, the r8100 or r8110's?
Just a tad unsure what to order.
Cheers.
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Thorn General / Re: (News of) New Thorn Mercury 40 prototype, destined for production
« Last post by PH on May 21, 2025, 03:30:01 PM »I built my wheel in 2013, at that time Rohloff specs were clear about two cross for 26 inch wheels.I don't think the advice from Rohloff has changed, Thorn seem to be unique in building this way, apparently with Rohloff's approval. As it's Thorn offering the better warranty, I'd have been happy going along with whatever they did.
I did ask why on here at the time and Dave Whittle, the then workshop manager, explained that 1x puts the spoke entering the rim at the same angle as 3x with a standard hub. No answer to why all heads out though.
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Thorn General / Re: (News of) New Thorn Mercury 40 prototype, destined for production
« Last post by PH on May 21, 2025, 03:24:14 PM »How much is there to test?Probably not much, they'll have put their experience into getting it right first time, but there could always be something that detracts from that X factor. Or some unintended consequence of a minor change, or conflict of components not evident till building it up, or just an error in communication between designer and builder.
I've only designed one frame, a one off, I didn't notice on the final drawing that the measurement to the chainstay bridge was to the center not the edge, that reduced tyre clearance by 8mm. Probably not the sort of error the experienced folks at Thorn would make, but wouldn't you want to be sure before ordering a container full of them?
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Wanted / Rohloff hardtail (enduro, catalyst)
« Last post by gover_1 on May 21, 2025, 11:46:07 AM »Hi everyone, looking for a rohloff geared hardtail such as an enduro or catalyst. I'm about 5ft10 /11 so there are a couple of sizes that could work.
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Bike Bits / Accessories For Sale / Thorn raven sport tour frame
« Last post by jrn on May 20, 2025, 09:53:19 PM »8
Thorn General / Re: (News of) New Thorn Mercury 40 prototype, destined for production
« Last post by Andyb1 on May 20, 2025, 09:47:45 PM »How much is there to test? The sidestand?
Thorn frame geometry is well proven.
The equipment looks well proven.
Good to get a few miles under the wheels but it does not look a radical departure from previous models.
Thorn frame geometry is well proven.
The equipment looks well proven.
Good to get a few miles under the wheels but it does not look a radical departure from previous models.
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Thorn General / Re: (News of) New Thorn Mercury 40 prototype, destined for production
« Last post by mickeg on May 19, 2025, 09:16:45 PM »...QuoteLooks like the rear wheel is laced one cross.1x and heads out, they've been building 700c wheels that way for a while now, mine from 2017 is like that. I was a bit dubious at first, but from a buyers perspective they're offering better warranty than the manufacturer! If there was an issue with it, they'd have discovered so by now.
I built my wheel in 2013, at that time Rohloff specs were clear about two cross for 26 inch wheels. But that was before the flange reinforcing rings were available.
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Thorn General / Re: (News of) New Thorn Mercury 40 prototype, destined for production
« Last post by PH on May 19, 2025, 02:21:11 PM »I just looked at it again, that chain looks way too tight.Not sure it is, or that you could judge from a photo. Just looked at a couple of my photos and chain looks as straight as that when new, and I certainly wouldn't run it taught.
Quote
Looks like the rear wheel is laced one cross.1x and heads out, they've been building 700c wheels that way for a while now, mine from 2017 is like that. I was a bit dubious at first, but from a buyers perspective they're offering better warranty than the manufacturer! If there was an issue with it, they'd have discovered so by now.