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Brake caliper fixings
Posted: Mon Jul 24, 2017 6:42 pm
by andrwboul
Hi, just re torqued front caliper bolt (40 NM) it felt odd then sheared ! Now ordered a complete new set from dealer and I am going to replace them all. Any thoughts as to why it failed ? Is 40NM correct ? Doubt it has been over tightened in the past (first time been off the bike as far as I am aware)..thanks
Re: Brake caliper fixings
Posted: Mon Jul 24, 2017 7:34 pm
by Britisherspy
Did the bolt shear? Was it stainless steel or galvanised steel?
Re: Brake caliper fixings
Posted: Mon Jul 24, 2017 7:52 pm
by milleplod
I think its 24nm for the caliper bolts.....
Pete
Re: Brake caliper fixings
Posted: Mon Jul 24, 2017 8:58 pm
by andrwboul
Original fixing - steel . I must double check the torque figure ...can anybody confirm ? Thanks
Re: Brake caliper fixings
Posted: Mon Jul 24, 2017 9:19 pm
by milleplod
My workshop CD-ROM shows its the rear caliper bolts that are 24, fronts are 30Nm....that's for 1200 bikes though, which is what I assumed you had....sorry!
1100 models seem to be 40Nm, the 1150 ones show 30Nm too.
Pete
Re: Brake caliper fixings
Posted: Mon Jul 24, 2017 9:38 pm
by Herb
People frequently overtorque brake calliper bolts and they stretch. Probably original on a near 20 year old bike.
Re: Brake caliper fixings
Posted: Mon Jul 24, 2017 9:49 pm
by SP250
And some people change them for stainless which has nice bling, but lower shear limits.
Re: Brake caliper fixings
Posted: Mon Jul 24, 2017 10:31 pm
by andrwboul
Thanks all - 40 it is then
Re: Brake caliper fixings
Posted: Tue Jul 25, 2017 5:59 am
by dave the german
According to Haynes, Non EVO brakes (10mm Allen bolt) 40Nm
EVO brakes (8MMTorx bolt) 30Nm
Re: Brake caliper fixings
Posted: Tue Jul 25, 2017 6:19 pm
by andrwboul
That's interesting mine being 8mm - thanks
Re: Brake caliper fixings
Posted: Wed Aug 09, 2017 6:43 pm
by andrwboul
Update - I decided to replace both front and rear caliper fixings - all from BMW. So new fronts all good - rears however supplied with allen head not torx as per original. Also they are an inferior quality (8.8 v 10.9). Anyone come across this before ?