Author Topic: Nomad MK2 - bottom bracket replacement (73mm Shimano BB-UN55)  (Read 568 times)

WorldTourer

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Re: Nomad MK2 - bottom bracket replacement (73mm Shimano BB-UN55)
« Reply #15 on: April 28, 2021, 09:39:03 AM »
VP is a wonderful Taiwanese firm which makes hight quality cycle gear built around their very high quality bearings and I wouldn't be surprised if the UN55 was made by them for Shimano

The UN55, at least ones I have bought in recent years, are marked Made in Malaysia (like a few other Shimano components nowadays), so unlikely to have that Taiwanese firm involved.

KvBCycles

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Re: Nomad MK2 - bottom bracket replacement (73mm Shimano BB-UN55)
« Reply #16 on: April 28, 2021, 10:51:04 AM »
I went to the local bike shops this morning and haha had a few great reactions.  The first guy took one look and asked me what´s wrong with me! I had to laugh. The word "antigua" was mentioned a few times, antique. One shop said he had exactly what I needed and for a brief moment I was hopeful but when he brought the part out - the model number was BR73, and the size was 68mm x 110mm.

SJS Cycles seems to be *the only retailer* holding 73mm square tapered BB´s at the moment, well apart from a guy on eBay in the US selling used ones for 50 dollars a pop.
Regarding Phil Woods - they appear to be out of stock. When I try to select the item on their website it shows up "out of stock", so I have sent them an email asking about availability.
In the meantime, my basket on SJS Cycles is holding a couple of Tange BB´s along with an eccentric bb and a chainring, may as well get those extras included in the package. About to hit the order button.
In the meantime, I´m going back to one of the bike shops - I asked if he can service the bottom bracket, remove and clean basically. It could just be a bit of dirt in there again (like I had previously in 2019). There is still some life in the UN55 yet. I can still ride the bike, cranks are not moving, just an annoying click, creak noise.
Karl.

Andre Jute

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Re: Nomad MK2 - bottom bracket replacement (73mm Shimano BB-UN55)
« Reply #17 on: April 28, 2021, 01:42:56 PM »
VP is a wonderful Taiwanese firm which makes hight quality cycle gear built around their very high quality bearings and I wouldn't be surprised if the UN55 was made by them for Shimano.

The UN55, at least ones I have bought in recent years, are marked Made in Malaysia (like a few other Shimano components nowadays), so unlikely to have that Taiwanese firm involved.

Thanks for hard information, World Tourer.

martinf

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Re: Nomad MK2 - bottom bracket replacement (73mm Shimano BB-UN55)
« Reply #18 on: April 28, 2021, 08:43:42 PM »
Link to the TA square-taper bottom bracket page in French (couldn't find an English option on the manufacturer's website):

https://specialites-ta.com/68-standard-axe-carre

When sold separately, the spacers needed for a 73 mm bottom-bracket shell are marked "Entretoise - Axix 2,5mm (pour boîtier de 73mm et montage dérailleur type "E") (sachet de 2)" and do not seem to be in stock at the moment. If ordering a complete unit for a 73 mm shell you would have to make sure that these spacers are included when the option 68/73mm is noted.

This is a link to the "English" page of a French online retailer that sells these TA units:

https://www.alltricks.com/Buy/TA+axix

I have the 131 mm length steel axle version, with the set of two 2.5 mm spacers, on my Raven Sport Tour.

This is the right length for the Rohloff chain line using my old-pattern TA cyclotouriste cranks, modern cranks use shorter axles.

The TA bottom bracket axles and cranks are supposed to be ISO rather than JIS, but in practice they seem to be different from some other ISO standard components I have had in the past (notably a Campagnolo bottom-bracket unit, which didn't fit satisfactorily on my TA cranks). YMMV, but I have successfully mixed TA ISO cranks with JIS bottom brackets and vice-versa.

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Off topic as not for 73 mm shells, but perhaps of interest for someone in the EU looking for a 68 mm UN 55 equivalent, Stronglight's site still shows a reasonably-priced square taper bottom bracket unit in the JIS standard:

http://www.stronglight.com/stronglight/index.php/welcome/afficher_Produit?id=210

This website has some, but only in 2 sizes :

https://www.xxcycle.com/bottom-bracket-stronglight-jp-400-al-bsc,,en.php

I have one of these on my large visitor bike, it has done about 11,000 kms so far and seems to be of comparable quality to the Shimano UN 55 units.

I expect TA and Stronglight retailers in France would supply to other EU countries, but perhaps not to the UK with the current post-Brexit uncertainties.
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On the thorny topic of higher shipping costs and/or delays due to Covid19 and Brexit (I live in France):

- I ordered some of the cheap bifocal "safety glasses" I use for cycling from England for my wife and self. They arrived last week on the date scheduled, from memory perhaps 1 or 2 days slower than my previous order several years ago. Shipping cost was significantly more than pre-Brexit, but not crippling. And the supplier added an extra pair as a gift, which more than compensated for the difference in shipping.

- And I have just received an order of mixed cycling spares/clothing care products from a prominent German on-line retailer. Absolutely no extra delay or cost compared to my pre-Covid orders from this company, and quicker than some orders from France. So, at least for some suppliers, Covid19 problems within the Europe Union have already been sorted out.

As far as SJS cycles are concerned, the shipping costs to France are currently very high. But this has happened before, and they eventually found a way to reduce the costs while at the same time maintaining their excellent packaging standards and prompt deliveries. I am reasonably hopeful that solutions for export deliveries will be found when the double whammy of the Covid19 panic and Brexit settles down.