The 5 Vis appreciation thread
06-18-23, 09:04 PM
#201
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My approach to crank/bb compatibility is to always match crank/spindle-bb/era/model/number of rings. I know other combinations can work, but I just match it up. Then again, I confess to a certain amount of OCD with respect to matching parts and/or which parts can be mixed. In any event, I have always found the old TA bb parts to be beautifully made from very nice and durable materials. I always use loose balls with TA, and you can get them adjusted to turn with such a small amount of friction. It is probably purely psychological, but I think that the TA Tevano parts may have been machined to an even higher tolerance than the standard branded ones. The spindle numbers are the same to ease in searching for the right parts. As a pure bonus, not a lot of people look for Tevano so you may even be able to find them at a bargain…The original numbers produced were much lower than the standard units, though….
another positive thing about Tevano to mention is that the chainsets were offered in both a polished and in an anodised finish
they seem to be little known in north america so that if one encounters some parts privately they may be at an attractive price
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06-19-23, 02:55 AM
#202
blahblahblah chrome moly
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I liked Tevano cranks too but one caveat to keep in mind, if you like triples: Their clone of the '70s Record Triple uses non-interchangeable bolts, and a different BCD. Forgive me for not remembering the details, but I think both the granny rings and the bolts for the granny are unique to Tevano. And I have almost never seen those parts for sale. So a triple crank with any of those bits missing, even a single bolt, might just have to remain a double for all eternity. One with some extra "lightening" holes in the spider — drillium!
Yes, there are ways to make a chainring of any BCD, and ways to make a set of custom bolts, but those options will be expensive, unless you're up to making them yourself. I can do those things, but I chose not to, and just used one of my Campy triple cranks instead, and sold the Tevano to a Hard Guy.
Mark B
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06-19-23, 06:57 AM
#203
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I was more asking if there's any general 'rule of thumb' for spindle length if going from asymmetrical to symmetrical. Yeah, the Stronglight and TA BBs are nice, and still out there to be found (though not getting any cheaper), and for my own bikes that'd be my choice. But I'm doing a sort of resto-mod build for a friend with a Stronglight 49D. The original Stronglight BB is badly pitted (they generally seem pretty bulletproof- I'm guessing grit/dirt got into it at some point and a PO continued grinding away with it.....) and I think a sealed BB is going to be the way to go, so I was sort of trying to zero on on a spindle length for a symmetrical BB (assuming I'll need to use a spacer(s), too).
06-19-23, 10:58 AM
#204
Wheelman
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I was more asking if there's any general 'rule of thumb' for spindle length if going from asymmetrical to symmetrical. Yeah, the Stronglight and TA BBs are nice, and still out there to be found (though not getting any cheaper), and for my own bikes that'd be my choice. But I'm doing a sort of resto-mod build for a friend with a Stronglight 49D. The original Stronglight BB is badly pitted (they generally seem pretty bulletproof- I'm guessing grit/dirt got into it at some point and a PO continued grinding away with it.....) and I think a sealed BB is going to be the way to go, so I was sort of trying to zero on on a spindle length for a symmetrical BB (assuming I'll need to use a spacer(s), too).
Got a 1961 Holdsworth Cyclone frame that had cracked Bayliss Wiley cups and a Brampton spindle.
I've now got a 49D and some new TA rings for it, but probably have to use a sealed BB.
My research shows Tange Seiki LN-7922 (or cheaper LN-3922) at around 68x115mm would probably work, but I've got no proof.
Sheldon mentions a Shimano UN52 115mm for a Hetchins: https://sheldonbrown.com/bbsize.html#ta but I think that's asymmetric.
So I'm planning to get a cheap LN-3922 and monkey around with it a bit, unless somebody has any definite info.
06-19-23, 11:04 AM
#205
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We have flat to rolling terrain here, and a 42 low is very useful…So it enables me to get good use out of cranksets like Campagnolo Super Record, Stronglight 106/107, and the TA Tevano- which is one of my all time favorite cranksets…
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