I’ve had an issue with my Cervelo P3 SL (2005 model) that has been getting worse. The horizontal dropout screws that adjust the fore/aft position of the rear wheel appear to be stripped or not functioning.
Basically the wheel started rubbing against the curved part of the seat tube. I backed out the screws to position the wheel as far out from the frame as possible but the wheel still rubs. The main issue seems to be with the drive side screw - it just doesn’t back out as far as the other side. I can get it to a point that the wheel doesn’t rub while just pedaling easy, but as soon as I torque or put any effort into a pedal stroke, it rubs again. So either the screws are not holding, or are stripped.
Has anyone experienced this issue? If so, how did you remedy? I’m taking it to a bike shop today but thought a little insight from others might help.
I’ve had an issue with my Cervelo P3 SL (2005 model) that has been getting worse. The horizontal dropout screws that adjust the fore/aft position of the rear wheel appear to be stripped or not functioning.
Basically the wheel started rubbing against the curved part of the seat tube. I backed out the screws to position the wheel as far out from the frame as possible but the wheel still rubs. The main issue seems to be with the drive side screw - it just doesn’t back out as far as the other side. I can get it to a point that the wheel doesn’t rub while just pedaling easy, but as soon as I torque or put any effort into a pedal stroke, it rubs again. So either the screws are not holding, or are stripped.
Has anyone experienced this issue? If so, how did you remedy? I’m taking it to a bike shop today but thought a little insight from others might help.
The problem isn’t with the screws, but with your skewer and/or how tight you have it.
Screws are only to help guide initial alignment when you first install the wheel, but the skewer is what should be holding it in place against the force of the chain, etc. Some of the super-light skewers just don’t have enough ‘bite’… may need to replace w/ a more conventional Shimano or campy, or my favorite, the Mavic - that puppy really clamps down.
What you have been experiencing is not all that uncommon. There are a few P2 and P3 owners that have experienced this. Yes, the skewer should be super tight and hold the wheel but the set screws are on the flimsy side. My advice is thus: remove them, clean the grease of 'em and add some blue locktite then reset them. If they are truly stripped then my advice is to take your frame to a great hardware store and acquire the perfect screws that will go up just a hair in size, re tap and replace with the new screw.
I bought my P3 from some giant dude who needed a steel skewer and the set screw on the drive side. What he did was to thread on 2 small nuts all the way up to the shoulder of the bolt, then install the screw–then loctite the screw when installing it. Seemed like a pretty good solution.
discovered this issue the hard way at IMAZ in 2006. Skewer was not tight enough and/or should not have been riding on a titanium skewer. On hitting a rough stretch of road under hwy 301 rear wheel came out. Left a lot of skin on the road. Fortunately did not break anything. Now ride with stronger skewer and make sure it is tight
discovered this issue the hard way at IMAZ in 2006. Skewer was not tight enough and/or should not have been riding on a titanium skewer. On hitting a rough stretch of road under hwy 301 rear wheel came out. Left a lot of skin on the road. Fortunately did not break anything. Now ride with stronger skewer and make sure it is tight
replace the screws with slightly longer ones, use blue locktite, and clamp it down tight.
That’s what I did on my P3C; depending on where you want your wheel, the stock screws simply aren’t long enough to give a decent enough bite to overcome the play when they are backed out a ways. I went to my LHS and got a new set of stainless steel screws, added some blue Loctite, problem solved. That being said, the input above in regard to the skewer is correct. The set screw really isn’t intended to prevent the wheel from moving if your skewer isn’t tight enough to prevent it.