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New bike stiff crank!

  • 10-07-2010 8:08pm
    #1
    C3PO
    Registered Users, Registered Users 2 Posts: 3,795 ✭✭✭


    I picked up a great deal on the net for a new (09 model) Pinarello FP5 in the UK. The guy I bought it from met me in Holyhead today and I put it in a bike bag and brought it home!
    Anyway as I was puting the wheels on and giving it a once over on the bike stand I noticed that the crank is quite stiff to turn - not binding but definately much stiffer than the Shimano cranks and bottom brackets that I use on my mtbs! Is this normal for a new bike or should I get someone to check it out?


Comments

  • #2
    SurferDude41
    Closed Accounts Posts: 339 ✭✭SurferDude41


    RPL1 wrote: »
    I picked up a great deal on the net for a new (09 model) Pinarello FP5 in the UK. The guy I bought it from met me in Holyhead today and I put it in a bike bag and brought it home!
    Anyway as I was puting the wheels on and giving it a once over on the bike stand I noticed that the crank is quite stiff to turn - not binding but definately much stiffer than the Shimano cranks and bottom brackets that I use on my mtbs! Is this normal for a new bike or should I get someone to check it out?

    Pinarello, use their own MOST bottom bracket system, these are large press fit bearings. I recall working on one of these bikes, a few years ago. The bike I repaired, had a campagnolo chainset. This featured a pair of alloy adaptor's, press fitted to the campag B/B axle. This older type couldn't be adjusted, to eliminate bearing play.

    Firstly, what chainset does your bike have? All the more recently manufactured chainsets, feature a way of pre-loading these press-fit B/B bearings.
    Anyway all these newer chainsets, have more bearing seal drag, than the chainsets of a few years ago.

    I hope this helps.

    Happy Cycling:)


  • #3
    C3PO
    Registered Users, Registered Users 2 Posts: 3,795 ✭✭✭C3PO


    Thanks for the helpful advice SurferDude! The bike has a MOST compact chainset (cranks and chainrings) and an FSA MegaExo bottom bracket. The bottom bracket looks (to me!) like a Shimano Hollowtech bottom bracket but the left crank doesn't have pinch bolts like the Shimano set-up, just one Allen bolt that appears to tighten directly into the axle at 45-50Nm. Everything looks ok but I'm wondering could there be a spacer missing or perhaps overtightened?
    Probably best to take it for a spin and see how it feels?


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