Tighter reduces drive train efficiency..mojotrick said:OK Thanks for the tip guys. I bought a neoprene chain stay cover on ebay for 8 bucks. To help muffle the noise.
How much do I tighten up that "B" screw?
The B-tension screw has no affect on the chain tension. It is used to set the distance of the jockey pulley from the cogs. Nothing else.jeffscott said:There should be a screw on the Rear derailer, it pushes on the bike frame and tightens up the chain tension.
Sometimes called the B screw.
Yes dear and the spring in the fist pivot is tightened and the chain tension increases...shiggy said:The B-tension screw has no affect on the chain tension. It is used to set the distance of the jockey pulley from the cogs. Nothing else.
A minor change at most. The adjustment is there for shifting performance, not chain tension.jeffscott said:Yes dear and the spring in the fist pivot is tightened and the chain tension increases...
It helps, been ther done that, whenever I bottom out the screw or after wintershiggy said:A minor change at most. The adjustment is there for shifting performance, not chain tension.
Even then it affects the mounting bolt pivot spring, which pulls the RD backwards, where higher tension would make the chain slacker, not tighter.
It is the cage spring that takes up chain slack/adds tension. The pivot/mounting bolt spring counteracts it to let the chain shift more easily to the larger cogs.
And IIRC SRAM RD mounting bolt pivots are not sprung at all.
Just wrap the stay (I use the seal sealing rubber tape) and shift into onto a larger cog and/or chainring to increase the chain tension (via the RD cage being pulled forward). Just do not use the big/big combo.mojotrick said:Im fairly new to biking. Been learning things here and there. My bike right now makes a awful chain slap noise whenever going over rough bumps. Do I need to tighten up the tension? or take up some of the slack?
This is on a 09 Wahoo. 24 speed.
As I said, it does little to nothing to the chain tension and the position change is subtle. It does affect your shifting.mojotrick said:Call me stupid but I went and moved the B screw all the way in and didnt see any movement on the derailluer, then I went all the way out and didnt see any movement either. what gives?
Hmm- good to know. How does one go about changing the cage spring position?Crossmaxx said:Shimano RD's (don't know about Sram) have two positions for the cage spring, one with less tension (default) and one with more tension. Changing to the higher tension position is probably the best adjustment you can do on your derailleur to reduce chain slap.