New: Take part in the January 2020 BikeRide Giveaway for a HEDKAYSE | ONE bike helmet

Welcome guest! Register or sign in to participate in the cycling discussions.

Crank bolt sizes
Hi, bit of a newbie to bike repair. I'm looking to change the front gears on my mountain bike. I've got the correct crank pulling tool, unfortunately I don't have the correct socket to remove the crank bolt. The bolt is bigger than the 14mm socket but smaller than the 17mm. Are there standard sizes of crank bolts (this is a Shimano gear-set, bike bought in the Netherlands, roughly 5-10 years old)? If so what is the most likely size I'll need to buy?
OK, if the crank set is Shimano, then the removing tool will fit the cranks (but not necessarily the bolt... been there). The bolt could be 15mm or 16mm, a regular 16mm nut will not fit inside the hole in the crank. The tool to remove small spark plugs could fit (it is 16mm), it did for me. Some bike shops have 15mm and 16mm nuts that are turned down to fit inside the crank hole.

Possibly Related Threads...
Thread Author Replies Views Last Post
  Brake boss sizes??? RustyChayne 7 8,874 12-14-2019, 01:53 AM
Last Post: RJD
  Tire & wheel sizes & matches budstutor 2 10,165 03-21-2016, 06:29 PM
Last Post: budstutor
  Loose bolt on left crank arm 9734Chris 24 86,143 01-03-2015, 05:43 AM
Last Post: spanner_152
  Cassette Sizes ElieK 2 2,981 07-22-2014, 01:52 AM
Last Post: Painkiller
  Jammed crank bolt telsalanut.wtm 5 5,633 04-17-2014, 01:16 PM
Last Post: nfmisso
  Crank Bolt Torque? !TREK4ME! 2 4,445 02-09-2014, 08:52 PM
Last Post: cny-man
  Replace rear axle bolt with longer bolt on an electra 3-speed michelehart 5 6,646 11-03-2013, 07:46 PM
Last Post: michelehart
  Stripped & stuck nondrive crank bolt Timfoley 4 7,586 05-30-2013, 02:38 AM
Last Post: Painkiller
  Removing bolt from crank krashTest 10 8,781 10-08-2012, 03:06 AM
Last Post: GeorgeET
  Stripped retaining bolt on right crank arm dcbriggo 4 13,347 06-03-2011, 04:28 PM
Last Post: dcbriggo

Forum Jump: