Technical & Reference Section > Tech and Restoration

freewhell info wanted

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TwoBobRob:
You're stuck with yer 16 I'm afraid.  I thought I could run a 15t on my Superpro hub - Nope!   :tickedoff:

2020mad:
Hmmm guess i won't be fitting 28T chainring tommorow then,  28-16 ratio a bit stupid.
Will have to start saving a bit more for some new wheels.

Nana:
You need a 10 to run a 28 teeth sprocket but it various but nowt by much you can run a 10x28 ,29,30,31 most common on new rides are 13x36

Rombloke:
ok the easiest way to work out gearing is to head for an average ratio of 2.75.
this is acheived by diving the front sproket size by the rear

i.e 44 / 16 = 2.75


so if you wanted to run a 28 tooth front, then that needs to be divided by the 2.75 which equals 10.18.....so as nana says you will need a ten tooth driver.

44/16
42/15
40/14
39/14
36/13
33/12
30/11
28/10
25/9
22/8

hope that helps....i feel nerdy now

Dave

power:
the smallest freewheel you can use on normal size threaded hub is 15 http://www.alansbmx.com/product_info.php?products_id=1179
you will need a flip flop hub to go smaller than that

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