brussel

OK Joahnn I think you're right a day off is need to process that...will get back to you

Splat: both chains are at 1/16 inch elongation over twelve inches...and when I put a new chain on the cassette was worn enough to cause skipping...hence the whole original post. Perhaps our measurement does not take into account all of the wear on the chain and hence a chain that is still acceptable by the measurement you have shown above can still wear a cassette unacceptably.

I measured over a full 12 inches with a steel meter ruler. All 3 chains were within acceptable length (until I broke one of them - now I am down to two). I agree though if one is wrecked it will still damage the sprocket. my suggestion is that to measure as I have suggested (if you could actually do it with any accuracy and repeatability) would be a better measurement than simply measuring across 12 links. Measuring across twelve links does not take into consideration the wear on the rollers...

try fizik themselves and a new one is about R2000 (although I think CWC in cape town has then for R1200)

yes...if both are nine speed they should work perfectly.

Johann sorry about the pic (and your headache!) perhaps I was not entirely clear: I used a 12" ruler not a commercial chain checker to measure the chain. I cannot comment on the state of the cassette, only that if that chain was OK the cassette should also be? I agree (mostly) with your statement about using two chains. In terms of wear and tear due to grit etc. using two chains would do nothing to lengthen a sprockets life. But if the wear is caused by a worn chain (stretched to use the common terminology) then the sprocket should last twice as long??

they were very helpful with me so I would try them

Windbreaker: >>Nope, the wear on a single link will be too small to measure properly. I agree - the theory is what I am testing - practically the tolerances are too small to accurately measure. If you took my measurement and multiplied it by 6 ( I think) you'd get combined wear on the links as well as the rollers - which I am wondering is not a better measurement? >>It doesn't sound like the chain was definitely within spec. But maybe I missed your point completely. It has less than 1/16 wear across 12 links. BUT there is a significant greater movement of the rollers compared to a new chain - so hence my discussion to see if the wear on the rollers is actually the issue Bos: I have used three chains and have nearly 5000km on the three chains and cassette. I do clean the chains regularly to minimize wear.

OK so I have been giving this chain wear thing some thought especially after this mornings very muddy ride in Worcester. I have a chain/cassette combo that according to accurate measurements is still within specs. But I put a new chain on and I get the chain skipping particularly in my most regularly ridden gear. Someone here in a another thread made a suggestion that makes more and more sense to me. Measuring pin to pin is only HALF the possible wear on a chain. It measures the wear on the INSIDE of the bush and pin interface only. So wear per bush x 12 links is the total wear. BUT The wear between the roller and the OUTSIDE of the bush is not measured (or if using a chain checker you can are actually measuring the wear on the inside of 12 bushes the plus the wear on the first and last rollers. The most accurate way (I am thinking here...)to measure would to be to measure the the distance between two rollers separated by two pins: that would give you the wear on the inside of two rollers AND two pins. So what do you guru's think - or am I being overly complex? I'm really trying to see why a chain that is within spec has worn a cluster to the point where it cannot be used with new chain.

they will same happened to mine...but cal them soon as I think the warranty is only 3 months. I then got an aliante from them as it fits me better - that one broke too so I got another one!!

MJlovesMTB - heart rate monitor was working A-OK Normally on a long climb of ten or more minutes I will ride at 170-175 and then hit max as I kick the last little bit. This ride though I was running at over 180 for long stretches which is a little unusual for me Needless to say the legs went south halfway but I still managed a top ten finish There were a couple of very attractive ladies Dirtbreath - but I was so delirious after the first few km I really did no notice much

OK so I am 35 years old really fit and an experienced rider. Max heart rate about 186. So on Sunday I raced the MTB race in Grayton. For the first hour I rode 80% of the time with a pulse rate over 175 and for long sections at a time I was over 180....I purposefully dont race with a HRM because I think I might scare myself - and I did!! I can normally sustain 170 for a long period of time say 15 minutes - but sitting at 180 plus for more than 10 minutes at a stretch is really unusual. Any ideas what is going on with my body?

that part of the N1 is legal to ride on - no prob pacing a truck - risky but fun, I have been known to do it more than once

Matchstix what the LBS price on those two puppies?

I must say Matchstix for the amount of walking I do hard plastic is not too bad. I do like the idea of the rubber round the edges of the shoe though...means the uppers are protected. Turtlek: those look good, I saw them at a LBS...nice price too though R2500!

Matchstix who is your LBS? What colour are they in? that green makes me...um...a little green

Matchstix a 42

The issue I have with my current ones is that they bend and put some uncomfortable pressure on the arch of my foot. If they bend to accommodate walking that would be great...ie bend only for walking but stiff in the opposite direction for riding. Speaking of sidi being soft I looked at the mavic shoes - very pretty but a VERY soft sole. Where do I look in cape town...Willie Engelbrecht has a good selection but holy cow they are pricey brussel2009-06-18 03:52:19

OK so I race cross country and marathon rides - I try to not walk unless it is a proper hike a bike. I like a nice stiff shoe and my current Olympics are a bit floppy and I need something a little better. I see there are some pretty nice shoes on CRC with good discounts too (I have a mate going over next week who can bring them back) I cannot justify spending several thousand on Sidi shoes as pretty as they are. So what are you riding with and what do you recommend?brussel2009-06-18 03:44:03

I have a mate who had exactly the same problem with his recon. It turned out there was a small wavy washer is between the circlip and a piston on one of the shafts. The washer allowed air to pass throught the piston. The washer was part of a service kit and once replaced it made a difference, but the play is still there. I have a fox and I have a similar effect. I notice it most when travelling across very fine washboard and it creates an effect similar to a loose headset.

OKO is the shiz - it does not dry out like stans does, imho it is way better!

183 and 75kg

why can't you do it on your 'dale? never really looked closely at one so I have no idea...

is XTR outer not prelubed?

I have it on my anthem as something I did last year - never had a moments shifting issues, a minor more amount of friction but shifting is crisp - and it keeps the crud out of the cables.