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Anyone use them? Are they actually effective?
Riding out in the Pyrenees both mine and Katie's cranks have taken a beating on the ends. Hers are Race Face Next Carbon, mine Shimano XT but both have chunks out of them.
Do rubber/silicon boots for the end actually stop this or do they just tear the first time you smack them into a rock?
http://www.bikeradar.com/mtb/gear/article/trail-tech-always-use-protection-38918/
RaceFace of Zefal ones are about £8 but there are silicon ones on eBay for less than £2 delivered.
I use the raceface ones, they're a firm.olastic rather than rubber and seem to me a good idea.
I use the RaceFace ones on my Swoop, and I used them previously on my Stumpjumper.
They do fit on other makes of crank but I found the distance from the end to the hole centre is different so they need a little bit of pulling into place.
Already shown their worth when I went out with my shock under pressured at BPW last weekend...