Why do my pedals hit stuff while mountain biking?

E

Evanch

New member
I mountain bike and recently while climbing I would bottom out and my peadals and crankset would hit large rocks or even the ground. I only have the problems going up hill and not down. Is my seat to low? Is my frame to small? I cant firgure it out and its annoying. Thanks...
 
you cant do anything about it except get a good new bike. this used to happen to me when I had a crappy bike, just because it had oittle ground clearence. if youre running a department store bike right now I suggest you go to the bike shop and get at least a 400 dollar bike, It is unsafe to ride those things on trails. I have never had this problem with my 800 dollar diamond back response comp, even my dads 300 dollar giant boulder does not do this.

Well... peter griffan is a top contributer so i guess he knows what hes talking about but I stand by my anwser, i have never had this problem with my bike, and i have never heard of crank stretch, but dont google it.
 
What you're experiencing is "crank stretch." As you pedal, the bottom bracket gets very hot; this heat then warms the cranks until the aluminum crank arms elongate, allowing the pedals to strike every object known to man. The best fix is to squirt some cool water on the bottom bracket every half hour.

/sigh
 
What you're experiencing is "crank stretch." As you pedal, the bottom bracket gets very hot; this heat then warms the cranks until the aluminum crank arms elongate, allowing the pedals to strike every object known to man. The best fix is to squirt some cool water on the bottom bracket every half hour.

/sigh
 
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