Ok, bit of a technical question that might have been covered already in detail here, but can't find it. I would like to get my SRM crank on the P5. Tried to do so this morning before giving up. I have never worked with press fit bearings before such as the P5 has. My LBS advised that to remove the crank, you can use a rubber hammer to get the non drive side crank arm out. I did this and did get it out, but it took quite a, well, hammering. I am not sure about doing this repeatedly on a carbon frame! I would be swapping the SRM crank between my P5 and road bike on a weekly basis and if I have to keep hammering the thing out of the P5 I am worried that I am going to do some damage at some point in the foreseeable future? Can anyone comment? I supported the drive side with my other hand to limit the frame flex, but really wasn't happy. With my road bike, the crank just slips out, no hammering needed. The press fit bearings seem a little tighter and hence the need for the hammer.
My second question is to do with the rotor cranks themselves. Both systems are Rotor 3d+ cranks, and the non drive side is identical. With the P5, I was supplied with an aero crank, and with my SRM I have O rings which are more of a road setup I guess. As you can see from the pictures below, when I put the SRM crank on the P5, there is about a 10mm gap between the back of the crank and the bearing. I know you can turn the non drive side crank arm to bring it in, but I'm not sure you can adjust it by that much! The culprit appears to be that the aero crank I have has a built up thing on the back that takes up more space - My SRM doesn't have this. Can you buy this and fit this aftermarket? Any suggestions as to what I should do?
Once fitted the crank has about 10mm of play as per the link below
https://flic.kr/p/r1Qfy4
And here is the side by side comparison of the two - the SRM is on the right hand side and you can see that it has less bits in the middle. The aero crank seems to have a built up section.
https://flic.kr/p/r1Zf6X
Sorry, wanted to embed in here but it's not working for some reason. Will keep trying...
Any and all advice gratefully received. Thanks.
My second question is to do with the rotor cranks themselves. Both systems are Rotor 3d+ cranks, and the non drive side is identical. With the P5, I was supplied with an aero crank, and with my SRM I have O rings which are more of a road setup I guess. As you can see from the pictures below, when I put the SRM crank on the P5, there is about a 10mm gap between the back of the crank and the bearing. I know you can turn the non drive side crank arm to bring it in, but I'm not sure you can adjust it by that much! The culprit appears to be that the aero crank I have has a built up thing on the back that takes up more space - My SRM doesn't have this. Can you buy this and fit this aftermarket? Any suggestions as to what I should do?
Once fitted the crank has about 10mm of play as per the link below
https://flic.kr/p/r1Qfy4
And here is the side by side comparison of the two - the SRM is on the right hand side and you can see that it has less bits in the middle. The aero crank seems to have a built up section.
https://flic.kr/p/r1Zf6X
Sorry, wanted to embed in here but it's not working for some reason. Will keep trying...
Any and all advice gratefully received. Thanks.
Last edited by:
Ironmike78: Feb 1, 15 9:30