|
MountainBikeReview.com's Forum Archives - - Passion -
|
|
Good ride, good crash, good question..... (5 posts)
|  Good ride, good crash, good question..... | TNJED®
Jul 1, 2003 8:43 AM | | Went for a ride in Leominster SP last night, that has me disturbed a bit. The ride went very well as always until about half way through. I was coming up to a log pile, and had very little momentum. I decided to give a quick power stroke right before the pile to roll me over it. I stood up on my pedals and went to crank and SNAP!!! I launched over the bars, and shoulder (luckily not head) first into the log pile.
I can honestly say that in my entire mountian bike life, that it was the first crash that was ENTIRELY my bike's fault. It felt as though the chain broke, but upon inspection, it was fine. NO, NOT FINE, I just went OTB!!! The rest of the ride was different...My bike had failed me, and now she was making me nervous. I actually did not make it up a couple of rocky accents, because of my sore shoulder, and anxiety about another mechanical failure.
Then, on the downhill back to the car, just as my confidence was rebuilding, it did it again. I didn't go OTB this time, but it almost caused a pretty high speed disaster. The chain just seemed to slip a couple of times...
QUESTION: Pardon moi, but WTF? I looked all over the drive train, and could not see any problems. Is it possible for my rear cog to slip under hard pressure? I've been riding for along time, and I know this is not just a ghost shifting issue. Any help is much appreciated. Thx
Jed |
| May be a dumb question... | Drewpy
Jul 1, 2003 8:53 AM | | Did you check the rings and cassette closely for wear. I've seen cassettes that have had only 1 or 2 worn points. If you notice any difference in the shape, it may be time for a new chain/cassette/rings.
I know, its one of those "Is it plugged in" questions, but the smallest difference could cause your problem. |
| check rings carefully | troy
Jul 1, 2003 9:18 AM | | Last time I replaced a cassette and chain I didn't replace the middle ring. Under power it would slip exactly like you are describing. New middle ring fixed everything.
If you haven't replaced them recently you might want to look into this. |
| How old is your chain?.... | Ricko
Jul 1, 2003 9:40 AM | | Snapping a chain is usually my cue to get on the phone and order a new one. Seems like a chain nearing the end of it's life span is more prone to having the plates spread out under load and pulling apart.
Last time it happened to me I was climbing...or attempting to climb...a short steep in too high a cog. Luckily I didn't wreck...UNluckily I was 6mi from my truck...where my chain tool was:/
The chain tool lives in my Camelbak now, duh. |
| coupla' things | glenzx
Jul 1, 2003 10:02 AM | | Besides the above mentioned good info., more causes could be that your freehub is dying and the pawls are 'skipping' under load. The way you describe it sounds exactly how I felt my old hub acting. That's the only other thing I can think of other than what was mentioned. I suppose if your crank has a 2 pc. drive arm/spider set-up, the spider could be 'slipping' also, but I'd imagine that would be VERY hard to make happen without something majorly wrong. |
| |
|
|
