XTR Never Again

[ Sizes: Orig | Large | Med | Small | Thumb ]

XTR Pedals costing £95. Came to put more grease in and the end of the axle fell off!!! In process of trying to get sorted on warranty even though 18 mnths old. Chain Reaction very helpful so far.

This is my 3rd issue with XTR. BB hopeless in mud and inner ring useless. They are not worth the extra. Stick to XT and save money!

Comments

[ Post a Comment ]

Viewing: 1-10 of 10

Visentin

Time Atac

Voted 10/10

I tell you !

Posted Aug 23, 2012 10:06 am


	Andy Livo	Re: Time Atac
	Hasn't voted	Maybe next time!
		Posted Aug 23, 2012 11:28 am

ferday

interesting

Hasn't voted

i've had one set of XTR pedals for 10+ years with no issues!

Posted Aug 23, 2012 11:21 am


	Andy Livo	Re: interesting
	Hasn't voted	These are the new ones!! Never had a prob with Shimano pedals and my last pair (10yrs old also) still going strong on my second bike!
		Posted Aug 23, 2012 11:27 am


	RayMondo	Re: interesting
	Voted 10/10	Can't fully make out the details, but looks like a failure at the root of the thread. Likely the specific method of finish of the thread (how it ends) is the problem.
		Posted Aug 23, 2012 3:55 pm


	Andy Livo	Re: interesting
	Hasn't voted	Yes Ray. There are two nuts. The lower one is a cone on which the bearings run and the upper one locks the cone in place. It's at the threads on the upper nut where it has sheared. The axle is CroMo. Do they heat treat the axle Ray to strengthen it? Has this caused a loss of strength 'cos CroMo shouldn't do this. Have to say that Chain Reaction have been good so far. Pedals sent back today. See if they will be replaced?
		Posted Aug 24, 2012 6:07 am


	RayMondo	Re: interesting
	Voted 10/10	Don't know if they heat treated it. The Cr (Chrome) gives it corrosion resistance, as does the Mo (Molybdenum), which also adds hardness and toughness. The alloy is a type of stainless, or high chrome steel. Bearing surfaces are often "case hardened". That's a surface treatment - giving hard, durable bearing yet keeping the under structure tough. But I guess it's still a mfg flaw - usually a fracture stems from a notch - hence at the base of the thread. They ought to replace it - especially if you mention the Internet community.
		Posted Aug 24, 2012 12:38 pm


	Andy Livo	Re: interesting
	Hasn't voted	Thanks Ray. Looking at the fractured surface it looks like there is a small notch and a clean break. Like its cracked and only part has broken if that makes sense?
		Posted Aug 24, 2012 3:44 pm


	RayMondo	Re: interesting
	Voted 10/10	Post a pic. When a laterally caused fracture occurs in a rod, there is often a lobe to one side. Unlike a rod pulled end on, which lobes in the centre. As an interesting piece of info - I was first amazed to learn that when forming metal, cold forming has benefits over hot (no oxidation). The first I saw a 1/4 inch piece of steel plate cold pressed into a cylindrical mould was jaw dropping. Under extreme pressure, metals plasticise. And not only that, to learn that metals are crystal lattices and then flow occurs is darn amazing to see. Copy this link to see how threads are best formed. The old way (and worst) is using a cutting die. Second is to grind a thread (most accurate). Third is to cold roll (vid). Perhaps the pedal spindle was die cut, instead of rolled. http://www.youtube.com/watch?v=kidWBeyOMA0
		Posted Aug 24, 2012 6:43 pm


	Andy Livo	Re: interesting
	Hasn't voted	Cheers Ray. Pedals gone now but examples of the same fracture are on mtbr.com. Sounds very like you describe it with a "lobe on one side" rather than at the centre. Metals are amazing aren't they?!
		Posted Aug 25, 2012 6:30 am