LOOK 695 - Zed 2 crank chainring bolt replacement option?

Discuss light weight issues concerning road bikes & parts.
Post Reply
supertight
Posts: 3
Joined: Tue Jun 19, 2012 11:45 am

by supertight

I recently bought a new LOOK 695 SR. The bike has been incredible so far but i have just one gripe with it. The chain ring bolts are creaking even after freshly greasing and the chain ring bolts set to recommended torque settings. I did manage to shear off one bolt, i just think i need a stronger bolt set in there as i'm 89kgs and put a fair bit of torque through the cranks when climbing. The creaking is only noticeable when rocking left to right and out of the saddle. I have never had any issues with DA or SRAM cranks/chain rings doing this so i'm convinced its the bolts on the Zed 2 cranks. I can hear it come from that area and it's not the BB. The bolts are stupidly lightweight alloy, i'm sure a heavier gauge bolt would fix the problem.

If anyone could shed some light on a more durable stronger bolt option it would be most appreciated.

Thanks in advance.
Last edited by supertight on Tue Jun 19, 2012 12:29 pm, edited 3 times in total.

Wcl4
Posts: 220
Joined: Thu Apr 12, 2012 4:33 am

by Wcl4

Not sure if there is one as the bolts on the 695 are longer than standard chainring bolts. The torquing specs on these bolts are really specific. Do you think the creaking is coming from the threads or because the bolts are rubbing against the chainrings themselves?

by Weenie


supertight
Posts: 3
Joined: Tue Jun 19, 2012 11:45 am

by supertight

Wcl4 wrote:Not sure if there is one as the bolts on the 695 are longer than standard chainring bolts. The torquing specs on these bolts are really specific. Do you think the creaking is coming from the threads or because the bolts are rubbing against the chainrings themselves?


I don't think it's the threads as they are freshly greased. I think it's the bolts physically creaking from the lateral force of the torque on the chain rings. It's as if the chain rings are flexing. If i sit down and ride hard without rocking the bike side to side (as in climbing mode) it doesn't do it. I am using SRAM Red chain rings on the cranks so might try switching them over to the LOOK specific ones or a SRAM TT disc type ring which i also have on another bike.

I know FSA have a huge range of chain ring bolts and it might be worth trying to find out what size the LOOK bolts are and whether any of their range would work.

durkonion
Posts: 188
Joined: Sat Dec 22, 2007 4:17 am

by durkonion

Creaks almost always sound like they're coming from the cranks but hardly ever do. If it only makes the sound when you're standing up, I'd check the headset/stem/shift levers. The quick releases are also a pretty common noise maker.

Steve_W
Posts: 296
Joined: Sun Oct 19, 2008 12:40 pm
Location: England

by Steve_W

Had the exact same issue, changed the bolts to kcnc same lenth as the looks.
Wrapped them in ptfe plumbers tape, stopped them creaking and working loose on this sr frameset.
Steve

supertight
Posts: 3
Joined: Tue Jun 19, 2012 11:45 am

by supertight

Steve_W wrote:Had the exact same issue, changed the bolts to kcnc same lenth as the looks.
Wrapped them in ptfe plumbers tape, stopped them creaking and working loose on this sr frameset.
Steve



Cool, thanks for the info. Can you remember which model the KCNC bolts are, there is a decent range here http://www.torontocycles.com/Selling/Ch ... ranks.html

Did you you continue to use the female part of the Look bolt or did you swap out the whole male and female parts?

Thanks again.

Steve_W
Posts: 296
Joined: Sun Oct 19, 2008 12:40 pm
Location: England

by Steve_W

I think the kcnc come as standard.... You do need to use the zed crank female bolts, these are required to work with the crankset.
steve
Ps.....I've just checked your link, it's not the campy ones you need.

kjbnz
Posts: 2
Joined: Mon Jul 30, 2012 10:56 am

by kjbnz

Hi guys... I have had a 695 for 18months now. Great bike but a few creaks as well. The bearings have been repacked and the local disties are going to replace them. I don't ride that often. The bike has only done 3500km total in that time. After around 7 months I was climbing a steep incline and all of the chain ring bolts sheared. The bolts were replaced with steel male bolts (original LOOK were alloy) and lock-tited. Bike started creaking again and we noticed that 3 bolts were loose and one had fallen out.

How many KMs have you ridden on the replacement bolts? any other problems showing up?

Cheers

KJB

User avatar
HammerTime2
Posts: 5422
Joined: Thu May 04, 2006 4:43 pm
Location: Wherever there's a mountain beckoning to be climbed

by HammerTime2

Has anyone provided feedback to Look? Not sure how common this problem is, but perhaps some design tweaking is in order, or has Look perhaps already done this and new units are better?

Johhny Bravo
Posts: 76
Joined: Mon Oct 20, 2008 5:06 am
Location: Minas Gerais, Brazil

by Johhny Bravo

creaking noise from BB area when climbing 8%+ slopes with small ring - no noise when hard pedaling with big ring
anyone else having the same issue?

btw, riding rotor 50-34 q-rings
Ride safe!
Eduardo
2011 Look 695 SR

Jerem
Posts: 1
Joined: Mon Sep 03, 2012 9:15 pm

by Jerem

Johhny Bravo wrote:creaking noise from BB area when climbing 8%+ slopes with small ring - no noise when hard pedaling with big ring
anyone else having the same issue?

btw, riding rotor 50-34 q-rings


Hi,

I'd bet it's your rear quick release, climbing put 2-3x more torque on the rear wheel than flat riding (for any given torque at the crank)... Had this problem this year after switching to KCNC QRs, these creaks always sound like it's coming from the crank/BB :)

Jeremy

notsoswift
Posts: 176
Joined: Mon Mar 07, 2011 10:00 am
Location: Melbourne

by notsoswift

So Iget this right, no one has had an issue on the original LOOK/TA specialties rings? Just other brands

User avatar
brycerider
Posts: 121
Joined: Tue Jul 14, 2009 11:59 am
Location: Australia

by brycerider

I would also check the freehub and cassette as they do make noise under load if there are issues

Sent from my HTC One XL using Tapatalk 2
N+1 It Never Stops

by Weenie


Post Reply
  • Similar Topics
    Replies
    Views
    Last post