Post and Discuss gear ratio's. SS MTBs too!

PB Forum :: BMX (20")
Post and Discuss gear ratio's. SS MTBs too!
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Posted: Oct 12, 2009 at 12:33 Quote
i guys
im getting a single speed rampant so what ratio should i get for general Dj's and little bit of freeride?

Posted: Oct 12, 2009 at 12:35 Quote
I'd say something like my bmx's current 39-14 soon to be lower >.> It has good resistance but it sails up hills.

EDIT: Actually I'd say try out some single speeds in shops or friends and see what you like, lots of people like running micro drives but everyone has different tastes.

Posted: Oct 12, 2009 at 13:02 Quote
well id like to run something reasonably small cos big drivers look ridiculous

Posted: Oct 12, 2009 at 16:34 Quote
DIYTx wrote:
39-14 atm but it might be 25-14 or 26-14 soon.

EDIT: I dunno if the current one is right because I haven't checked, I just looked on the site. But does 25-14 sound good?
sounds horrid, i found 25-12 on a 26" mtb to be too easy.

Posted: Oct 12, 2009 at 19:17 Quote
so what would be best just get smaller rear? I want to run micro drive because huge sprockets are ugly as poopies.

Posted: Oct 12, 2009 at 19:36 Quote
DIYTx wrote:
so what would be best just get smaller rear? I want to run micro drive because huge sprockets are ugly as poopies.
28-13 is a good one
as is 25-11 or 12

Posted: Oct 12, 2009 at 19:38 Quote
I'm cool and generic.

25-9

Posted: Mar 21, 2010 at 18:53 Quote
How would 36-18 be for a XC bike? I used to run 32-17, but my drivetrain rusted and I purchased the new parts but haven't installed them yet, will I notice any difference in pedaling difficulty and will I be able to go faster?

Posted: Jul 20, 2010 at 14:50 Quote
what about 12th back what would be a good one on the front ? for a 24"

Posted: May 11, 2011 at 16:07 Quote
i have 10t in the back and need a new sprocket in the front. how many teeth should i go for?
ps i have a mtb

Posted: May 11, 2011 at 16:10 Quote
Look at the thread date ..
Unsecure image, only https images allowed: http://www.city-data.com/forum/attachments/oklahoma/23753d1216512869-official-oklahoma-forum-chattin-thread-rip-thread.jpg

Posted: May 11, 2011 at 16:11 Quote
haha yeah i saw that after i posted it

Posted: May 11, 2011 at 20:09 Quote
seeing as you dug this up,
25-10.
I run it, nice a heavy, good for going big.
About 65 gear inches.

Posted: May 12, 2011 at 13:35 Quote
Formula:
x = rear cog size
y = front chainring size
z= wheel size in inches

55=(Y/X)*Z

y= (55*X)/Z
round up to nearest whole number for a harder ratio or down for an easier one.
X= (Y/55)*Z
round down to nearest whole number for a harder ratio round up for an easier one.

/end thread

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