I was trying to get my picture to match OneGoodKnee's so a comparison could be made since my 39/53 clears and his doesn't.You should be measuring to the center of the space between the two chainrings. I believe the typical chainline measurement is 43.5mm. Given the photos, that looks pretty close.
I wanted to do some research on my end before I answered. I just got an email response today from my European office that they had been clued into this by you, and unfortunately it appears that, despite their drawings and measurements (which is what we go off of when designing), Campagnolo Ultra Torque 39/53 cranks uses bolts that stick out in the back and interfere with the stays and are incompatible with our frame. No fix has yet to be made. Sorry about that.Thanks for the images TKA, they do appear pretty similar.
I'm happy with the compact, if I ever get back to TwoGoodKnees then I might miss the 39/53 but I'll just have to fit a non Campag version.
I did e-mail the Ritchey people in Europe many months ago. They asked for pictures and measurements etc. I sent them, but they never got back. I said that I thought it was probably just an issue with the UT 39/53 and not a frame issue, just a compatibility issue. I took their lack of reply as simply confirmation of this.
I love the bike, not complaining about it, just disappointed when the 39/53 didn't fit and I was interested to see if anyone else had other experiences with these UT chainsets.
TKA has shown me it is possible, albeit with a different (newer) version UT crank.
Yes, I run 25 mm 4000S II's with Ultegra brakes. No problems with clearance, especially on the rear. Rim width makes a difference; the wider the rim, the less clearance you will have all around. I kinda wish I had more fork clearance, but the brake itself clears the tire just fine. You might try 23s. The 4000S 23s actually measure 25mm when mounted on my Ultegra 10 speed wheels. The 25s about 27.5mm.I changed tires this spring from Conti Hardshells to Conti GP 4000 S II and now I have a clearance issue. On my last ride on the bike last fall I road thru a pile of leaves on the side of the road. Some nice person hid a a 4" thick chunk of steel in the leaves. Somehow I did no damage to the front tire but dented the rear HED Belgium+ and cut the Hardshell. Lesson learned, don't ride thru the leaves.
Both tires are 25mm but the GP 4000 hits the underside of my Chorus Skeleton brake. There is plenty of clearance around the fork, and the Hardshells cleared the brake by 3-4 mm. I've managed to adjust the Skeleton brake to give me about 1 mm clearance, but with the spring road conditions this is causing the brake to act like a old tire saver.
Anyone else running Conti GP 4000 S II on their Road Logic, and do you have adequate clearance at the brake? I'm planning on changing the brake to get better clearance and want to know if an Ultegra or DA gives better clearance. Or if there is another brake that works better I'll get that instead. The last option is to pull the pre-Skeleton brake from my commuter and put that on the Road Logic, but that will only work if the Skeleton brake clears the 28mm tires on the commuter which I doubt it will.
I just attempted to install 28mm GP4000S II in the front - at 70psi. I'm using the WCS Zeta II wheels and Ultegra 6800 brakes. It has 2-3mm of side clearance in the fork and the brake, but the center seems to JUST rub both the fork and the brake on two small spots in the tire's rotation, and has less than 0.5mm (a half) millimeter clearance around the rest of the rotation.Anyone else running Conti GP 4000 S II on their Road Logic, and do you have adequate clearance at the brake?
same thing that happened with my ritchey forks/brakes, just too tight. do any new ritchey road models take 28's?I just attempted to install 28mm GP4000S II in the front - at 70psi. I'm using the WCS Zeta II wheels and Ultegra 6800 brakes. It has 2-3mm of side clearance in the fork and the brake, but the center seems to JUST rub both the fork and the brake on two small spots in the tire's rotation, and has less than 0.5mm (a half) millimeter clearance around the rest of the rotation.
I'm going to try a 25mm Conti GP 4000 S II and see how that works. The bike came with (I bought the full bike) 25mm Ritchey WCS Race Slicks, so I imagine the 25mm Contis will work fine.
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