GuyBoden
Guru
- Location
- Warrington
I am trying to select a rear socket for my Wife's bike, so it is easier for her to pedal.
Currently my Wife's bike has a 45T front and a 18T rear sprocket.
The chainstay length is 435mm.
The current chain is 51 links (51inch), which includes about a 3/4 inch slack.
The bike has vertical drop outs, so there is no room for moving the wheel backward/forwards.
There is no chain tensioner on the bike and I don't really want to install one.
I've been using this chain length calculator:
http://www.machinehead-software.co.uk/bike/chain_length/chainlengthcalc.html
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
18T (Current sprocket)
For a 18T sprocket the recommendation is:
Recommended length = 51 inches or 51 links (Which is what is currently on the bike.)
Unrounded result = 50.2706255585656 inch
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
22T
For a 22T sprocket the recommendation is:
Recommended length = 52 inches or 52 links
Unrounded result = 51.197128486344006 inch
Do you think the result for the 22T sprocket would work, with enough slack?
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
24T
For a 24T sprocket the recommendation is:
Recommended length = 52 inches or 52 links
Unrounded result = 51.664740048919334 inch
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
The 24T does not seem to have enough slack.
But, would a half link chain work with the 24T?
I've calculate that adding a half link to a 52 link chain would work:
Subtract the Unrounded result from the Actual chain size give the slack.
52.5 - 51.67 = 0.83 inch slack
So, am I correct in thinking that a 52 link chain plus a half link would be ok for a 24T sprocket?
Thanks
Guy
Currently my Wife's bike has a 45T front and a 18T rear sprocket.
The chainstay length is 435mm.
The current chain is 51 links (51inch), which includes about a 3/4 inch slack.
The bike has vertical drop outs, so there is no room for moving the wheel backward/forwards.
There is no chain tensioner on the bike and I don't really want to install one.
I've been using this chain length calculator:
http://www.machinehead-software.co.uk/bike/chain_length/chainlengthcalc.html
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
18T (Current sprocket)
For a 18T sprocket the recommendation is:
Recommended length = 51 inches or 51 links (Which is what is currently on the bike.)
Unrounded result = 50.2706255585656 inch
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
22T
For a 22T sprocket the recommendation is:
Recommended length = 52 inches or 52 links
Unrounded result = 51.197128486344006 inch
Do you think the result for the 22T sprocket would work, with enough slack?
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
24T
For a 24T sprocket the recommendation is:
Recommended length = 52 inches or 52 links
Unrounded result = 51.664740048919334 inch
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
The 24T does not seem to have enough slack.
But, would a half link chain work with the 24T?
I've calculate that adding a half link to a 52 link chain would work:
Subtract the Unrounded result from the Actual chain size give the slack.
52.5 - 51.67 = 0.83 inch slack
So, am I correct in thinking that a 52 link chain plus a half link would be ok for a 24T sprocket?
Thanks
Guy