Does WD40 wreck tyres?
 

I try to keep it off the tyres when I clean my chain, but is it worth it.

Am I concerned about nothing, or does it wreck the rubber and threads?

I don't know if WD-40 damages tires, but if the spray can get on your tires, it can get on your rims too. That could cause a seriously bad day when you apply the brakes! :eek:

Why do you use it to clean you chain ?

I don't wanna start another "WD40 against the world" discussion (:)), but it seems to
do a reasonable job of cleaning the chain, it's cheap, I can buy it anywhere (including the
supermarket at 3:00 in the morning), and I especially like the way the high pressure-pack blasts
off heaps of crap.

I would keep it off of the tires and especially the rims. I would also be careful not to get it into bearings as with the "high pressure" you mentioned it can easily get into critical areas and dissolve the grease. Other then that I frequently use it to keep non-lubed moving parts clean and smooth (such as brake and shift levers).

From their FAQ:
http://www.wd40.com/Brands/wd40_faqs.html
What surfaces or materials are OK to use WD-40 on?
WD-40 can be used on just about everything. It is safe for metal, rubber, wood and plastic. WD-40 can be applied to painted metal surfaces without harming the paint. Polycarbonate and clear polystyrene plastic are among the few surfaces on which to avoid using a petroleum-based product like WD-40.

I have been very impressed with its cleaning abilities. I saw a guy at a race using it...and I was like, theres no way tahts gonna work. then, walla! a sparlking clean chain! Needless to say, I was impressed. And 3.00 for a big can that lasts forever is pretty darn good.

good get

it don't surprise me!:)

... and it leaves a residue that prevents lubrucants from adhering to the chain... but if you like a non-lubed chain, go for it!

Surely we're not all gunna have this discussion again :D

http://sheldonbrown.com/chains.html

"One of the great controversies of chain maintenance is whether you should oil a chain or not. The downside of oiling a chain is that the oil may carry grit into the interior of the chain, and that this grit-mixed-with-oil will act as grinding compound, causing accelerated wear. Many experts whose judgement I highly respect hold this opinion, but I do not believe that this is always the case. I have no doubt that this "grinding-compound" effect can occur, but the severity of the risk depends upon the sort of dust/soil prevalent in a given area, and, particularly, the oiling technique used. "