I've now fitted the new TA Alize track cranks and bottom bracket and the chainline is a very atypical 46.5mm, as measured with my vernier calipers. The BB is the correct 103mm TA Axix Light and the spindle is symmetrical (I tried it the other way around, to be sure).
The good news is I can buy that Goldtec track hub I wanted, because that will give a perfect chainline with this chainset, even if Goldtecs are incompatible with track standard.
Sheldon - any chance of listing some *front* chainline measurements, with cranks and the recommended BB, on your excellent website? There's one above for starters...
"Nulla tam bona est fortuna de qua nihil possis queri." - Syrus
Zog The Undeniable said:
I've now fitted the new TA Alize track cranks and bottom bracket and the chainline is a very atypical 46.5mm, as measured with my vernier calipers. The BB is the correct 103mm TA Axix Light and the spindle is symmetrical (I tried it the other way around, to be sure).
This pretty much mirrors my experience a few years ago with this crank and bottom bracket combination when these models were introduced. Manipulating the cups to the left (both cups of the TA b/b are adjustable) allows one to cozen a couple of milllimeters of chainline movement toward the bike's centerline, but I found no practical way to get the crank to conform to the common contemporary track chainline range of 42.5 to 43 mm.
------------------------------- John Dacey Business Cycles, Miami, Florida http://www.businesscycles.com Since 1983 Our catalog of track equipment: online since 1996 -------------------------------
This pretty much mirrors my experience a few years ago with this crank and bottom bracket combination when these models were introduced. Manipulating the cups to the left (both cups of the TA b/b are adjustable) allows one to cozen a couple of milllimeters of chainline movement toward the bike's centerline, but I found no practical way to get the crank to conform to the common contemporary track chainline range of 42.5 to 43 mm.
My Axix is not adjustable. The RH cup is fixed, and the instructions make this clear.
This pretty much mirrors my experience a few years ago with this crank and bottom bracket combination when these models were introduced. Manipulating the cups to the left (both cups of the TA b/b are adjustable) allows one to cozen a couple of milllimeters of chainline movement toward the bike's centerline, but I found no practical way to get the crank to conform to the common contemporary track chainline range of 42.5 to 43 mm.
My Axix is not adjustable. The RH cup is fixed, and the instructions make this clear.
Clicking on the "more details" link on that page brings up a diagram showing a unit with a traditionally flanged fixed cup which I assume is a more recent generation which you have.
When I first encountered this chainline issue a few years ago, I returned the whole stock of these cranks I had bought to the distributor from which I'd gotten them. The subject came up again in conversation some months ago and they advised me that the source of the problem was a batch of bottom bracket spindles whose tapers were out of spec and the wide chainline matter had been resolved.
Your report would indicate otherwise. ------------------------------- John Dacey Business Cycles, Miami, Florida Since 1983 Comprehensive catalogue of track equipment: online since 1996. http://www.businesscycles.com
When I first encountered this chainline issue a few years ago, I returned the whole stock of these cranks I had bought to the distributor from which I'd gotten them. The subject came up again in conversation some months ago and they advised me that the source of the problem was a batch of bottom bracket spindles whose tapers were out of spec and the wide chainline matter had been resolved.
Your report would indicate otherwise.
The cranks go far enough onto the tapers that clearance between the crank and the cup is *minimal* (the cranks are chamfered to just miss the cups). I think the distributor was having you on.
Anyway, the solution is a Goldtec hub - comparable in price to DA, but also with a weird chainline.
