Going up or down?

[Andy R]

I meant the chain position coming off the cassette??

It's the amount of wrap to the top pulley that matters - where the other pulley has to be to take up the slack doesn't influence how many teeth the chain is in contact with.

 

[letmetalktomark]

http://uk.youtube.com/watch?v=0Lwlr5ZAoQ4

 

[daj]

well for what its worth then, I have got one that goes down and have had no problems yet

 

[perry]

up is better but springs wound so they push down are more plentifull and probably cheaper


i havnt got around to taking one apart to see if the spring is the same as an ad990 but i suspect it is

geared bikes are less likely to slip under load due to rarely being under load , if the gear gets hard a lower ratio is an inadequate feeling away

 

[cchris2lou]

Up is better .

and it gives a cleaner look .

 

[dyna-ti]

Up as it wraps more chain round the sprocket.

Ditto

 

[guybe]

Down makes it a lot easier to get the wheel out on my old Ali O SS.

Up made it nearly impossible.

Ditto, I prefer it pushing down as it's easier to take rear wheel off and looked tidy, I followed 'charlie the bike monger' advice after looking his youtube video, here is the link:-

http://uk.youtube.com/watch?v=93M9lvl8LM8

 

[sunchaser]

None of the above... get a propper ss frame with track ends

Or get Dave Yates to retro fit some as he's just down the road at Coningsby

 

[hamster]

geared bikes are less likely to slip under load due to rarely being under load , if the gear gets hard a lower ratio is an inadequate feeling away

I just don't get this slippage thing. If Alessandro Petacchi can stomp on the pedals like a gorilla with 53-11, so wrapped over only 6 cog teeth then surely it's not an issue. Let's face it, the road sprinters push so hard you can see the frames flex in the slomo finishes.

I have never, ever seen slippage on a road sprint finish.

 

[perry]

is that 53 - 11 from a standing uphill start with a chain packed full of mud though ?

a road mech probably has a stronger spring than most people set their tensioners too