|
|
Post by craig3277 on Feb 2, 2018 1:55:48 GMT
I am in the process of restoring my original aerospace pro that I bought back in the late 70's. I want to put a threadless bottom bracket in with a JIS taper spindle. The threadless bottom bracket I'm set on using is the Velo Orange unit. Where I am getting lost is the length of the spindle. I know the ISO spindle is 122mm, but I'm guessing a JIS cranksset needs something shorter, I just don't know how much shorter. I saw someone mention a 113 mm spindle, can anyone verify that??? The crankset I will install is a double.
|
|
|
|
Post by vtchuck on Feb 2, 2018 17:05:46 GMT
I used a YST 113mm on mine and it worked fine with a compact IRD double crank.
BTW, Velo Orange are pricey, but significantly better quality & design than other threadless models.
|
|
|
|
Post by rotors on Feb 5, 2018 9:06:08 GMT
I bought a Velo Orange and it is nicely made however I just couldn't tighten it up so it 'gripped'.
I put in a thin sheet of alloy to take up the slack but I then ended up stripping the threads on it, I wasn't happy.
So I ended up getting the same as vtchuck's, a YST 113mm, it went in okay and has done the job although the bearings don't feel as smooth as the Velo and it's a bit on the weighty side.
The crankset's a Miche compact.
|
|
|
|
Post by craig3277 on Feb 6, 2018 14:16:51 GMT
Thanks vtchuck and rotors. I think the YST is the way to go, and my Sora crank calls for a 110 mm sp8indle so that's what I will get. I had thought the YST and the Velo orange threadless brackets were the same design but in fact they appear to be totally different. The YST looks to be steel and squeezes on the ends of the frame tube, which makes sense. The Velo Orange on the other hand relies on a wedge type of gripping on the ID of the bottom bracket tube, which means the other tubes have to be ground down 100% to be effective, and in fact I can see this design `pushing' on the welds of the other tubes coming into the bottom bracket. Could be trouble, and I can understand why rotors had a problem getting it tight. It can't grip where the bearing sat, because that ID is larger for about 3/8" of an inch, so it can only grip near the center of the frame tube, where the other tubes are coming into the big one.
|
|
