|
Retrofit a new chain ring
|
|
03-23-2009, 08:21 PM
I have a recumbent bike with a Durabi crankset 32/43/52 TX 165mm. I would like to be able to ride up hills a little more easily. Is it possible to replace the 32 with a 27? How difficult is this and what other considerations are involved in changing this chain ring?
03-24-2009, 03:32 PM
Firstly you need to know the "BCD" (bolt circle diameter) of the crankset.
http://sheldonbrown.com/gloss_bo-z.html#bcd The BCD can also be measured from the centre of the crankpin to the centre of a mounting bolt x 2 = diameter. Probably the smallest chainring that will fit yours is 30T. A 27T may have the mounting holes nearer the centre. You would have to change the whole crankset if this is the case or optionally put a bigger cassette at the back.? If you do decide to fit a new crankset then also consider longer (170/172/175mm) cranks. This will give you a bit extra torque but will depend on your leg length etc.
Ride hard or ride home alone!
|
| Possibly Related Threads... | |||||
| Thread | Author | Replies | Views | Last Post | |
| Chain ring compatibity | Jro3 | 1 | 3,941 |
07-19-2016, 02:09 PM Last Post: Joe_W |
|
| Front Chain Ring Guard/Cover/Shield? | 1FJEF | 3 | 10,672 |
03-17-2012, 07:25 AM Last Post: 1FJEF |
|
| Chain ring is touching my frame | doomsdaysignals | 3 | 6,980 |
12-03-2011, 12:46 PM Last Post: doomsdaysignals |
|
| Freewheel and chain ring alignment | heretikfire | 5 | 14,731 |
12-23-2010, 03:10 PM Last Post: Bill |
|
| Replace a Chain ring from 50T to 52 T | macaw | 4 | 9,204 |
08-09-2010, 04:02 PM Last Post: macaw |
|
| Ultegra triple ringing on middle chain ring | kkramko | 7 | 11,380 |
05-09-2010, 10:05 AM Last Post: Joe_W |
|
| Front Chain Ring size? | joker3366 | 4 | 12,912 |
05-03-2010, 01:31 PM Last Post: cyclerUK |
|
| 11-32 vs. 11-34 chain ring | Malcolm Coupe | 1 | 7,467 |
04-24-2010, 10:27 PM Last Post: GeorgeET |
|
| Chain Ring Bolts | ILoveBikeLub | 2 | 7,493 |
12-30-2009, 11:11 PM Last Post: DaveM |
|
