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Broken Crank arm

  • 21-04-2009 9:07am
    #1
    Deisetrek
    Registered Users, Registered Users 2 Posts: 274 ✭✭


    Nearly wiped out last night whilst out on the bike . Crank arm on the left side (non drive side ) broke right across the pedal mounting hole . Ended up in the ditch thank God , as opposed to ending up going out into the middle of the road if the right crank had broken . Point is the bike is less than 2 years old , ok I've put up good mileage but should a Bontrager crank arm fracture like this ? Has it happened to anybody else ? Is it a case of making crank replacement a part of maintenance routines after a certain mileage? It's not a case of over tightening my pedals either , I always put a film of grease on them and lightly tighten with a pedal spanner ........any advice would be appreciated .......PS my bike is a Trek 1000 (2007)


Comments

  • #2
    NeilMcEoigheann
    Closed Accounts Posts: 461 ✭✭NeilMcEoigheann


    jesus that was a close one, i'd be onto the shop you got the bike from sounds like a manufacturing fault.


  • #3
    Chips Lovell
    Moderators, Politics Moderators, Sports Moderators Posts: 24,269 Mod ✭✭✭✭Chips Lovell


    A Campag Record crank broke on me last year. It was less than a year old. I warrantied it. The pedal eye is the most common area for crank failure.


  • #4
    Deisetrek
    Registered Users, Registered Users 2 Posts: 274 ✭✭Deisetrek


    My Name is Mario wrote: »
    A Campag Record crank broke on me last year. It was less than a year old. I warrantied it. The pedal eye is the most common area for crank failure.


    Did the shop sort you out or did you have to deal with Campag ? I know Trek frames have a lifetime guarantee but I doubt that my crank would be covered . Was out of the saddle climbing up a steep hill when it happened last night , I was only thinking thank God it didn't happen last weekend when I was on a group cycle with the Comeragh CC , I would have probably brought down a dozen other cyclists 'cause the bike was totally out of control .


  • #5
    Chips Lovell
    Moderators, Politics Moderators, Sports Moderators Posts: 24,269 Mod ✭✭✭✭Chips Lovell


    Deisetrek wrote: »
    Did the shop sort you out or did you have to deal with Campag ? I know Trek frames have a lifetime guarantee but I doubt that my crank would be covered . Was out of the saddle climbing up a steep hill when it happened last night , I was only thinking thank God it didn't happen last weekend when I was on a group cycle with the Comeragh CC , I would have probably brought down a dozen other cyclists 'cause the bike was totally out of control .

    Twas Chain Reaction. And they were terrible to deal with over it. I got a new one out of them in the end.


  • #6
    Deisetrek
    Registered Users, Registered Users 2 Posts: 274 ✭✭Deisetrek


    My Name is Mario wrote: »
    Twas Chain Reaction. And they were terrible to deal with over it. I got a new one out of them in the end.

    Just to finish this subject off , brought the crank arm to the bike shop ( the excellent Tony O Mahony in Dungarvan) and we had a good look at the fracture point where the crank perished . You could actually see a film of the Moly grease I had used to insert the pedals in one section of the fracture . This indicated that it hadn't happened today or yesterday , He told me that it's a good idea when washing a bike or doing regular maintenance to keep an eye out for cracks in frame , seatposts and as I learned , the cranks ...........it could save your life ......


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