Join Date: May 2003
Location: Mountain Brook. AL
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Sounds like a 5mm stretch? If the bike is steel (Cannondale steel??) you could put a leg and
a couple of arms into the job and just over stretch it enough to reset to a wider stance.
More accurately you could use a 1/2inch allthread, a couple of nuts and washers and a caliper
to do the same thing. There is a small risk of splitting the seams at the BB. OTOH if this is
a typical aluminum frame, your risk is a bit higher as aluminum has a fatigue limit and every
mount dismount cycle increments. Failure will be sudden and catastrophic. Good thing aluminum
is up to $0.85 per pound scrap, as the frame will then be worth $6-7 at that point. Al can't be
sprung to a wider stance. As long as it is easy to do the risk is low in reality and you are not
shortening the frame life a whole lot. No one could say how much and the bike is steadily
shrinking in value as the 10spd era marches on. I would say continue to do it.
Parenthetically I have a 5spd Teledyne Titan frame that has to be sprung to
mount the 9-10spd wheel I am using and it takes a bit of effort to put the
wheel back in. I had a Peugeot PX10 531 frame that I put an 8spd on and
it was a real wrestling job to get that wheel back on the bike. About 2x the
amount of muscle needed. I can get the wheel in with both arms pulling the
Titan rear triangle but to put the wheel in the Peugeot I have to sit down,
put a foot on one side pull with an arm and manipulate with the other arm.
Neither bike seems to care about the off angle fork ends.
Last edited by sch; 03-28-08 at 09:42 PM.