So, i currently have a charge duster ebb frame running 32x16. What i want to know is, would it be possible to fit a 18t cog (or maybe even a 20t) next to the 16t, using the ebb to take up the chain tension?
Chainline isn't an issue as the ebb has some sideways adjustability and i'm using a normal pro2 rear hub with lots of small spacers.
I'm just wondering if the ebb could be utilised for this purpose?
probably - it depends how eccentric the bb is as to how many links worth of slack you can adjust the BB for.
Also bear in mind that adjusting EBB's whilst you're out riding is not always a 2 minute job.
If you find the 16 too tall why not switch to an 18 for a bit and see how you get on - it doesn't change your top speed much but it does make hills slightly easier...
You could try a hammerschmidt crank instead (the expensive but interesting option)
the dusters ebb is 2 bolts underneath - so quite a quick adjustment. I'm also ok running the 16 where i live (thetford/woburn trails), it's more so that i like the idea of an easier gear if required when i venture on new more mountainous trails.
So, does anyone know how many chainlinks slack the ebb can mop up?
move the ebb right back aND measure centre to centre from axle of crank to wheel axle, move EBB right forward and remeasure - compare the difference between two with the chain you're running to see how many extra links that is?
Ran my old 26", & now 29" Inbreds like this, swapping to suit. Sliding dropout had enough slide to cover both.
It could be an excuse to go to a Surly Hub & one of them posh White Industries Dual Sprockets. Mmmmm.
Be simple to Twinglespeed it. 2 front chainrings, 2 rear. So long as the sum of the teeth add up to the same figure, you'd have the same chain length (more or less depending on the wear on the components).
eg: 32 + 19 = 51; 34 +17 = 51
Quite a few people do something like this to get a higher ratio if they have to ride for extended distances on the road to get to the trails. Keeps it light and simple.
I found epi's rule didn't work for twingle-speed, I had to tension the chain, that was on bigger jump than 2T though.