What nimber of teeth front and back is everyone using? I cracked my stock 34t ring and now I'd to run a little more compact set-up. My background is heavily xc, so I'm relatively new to the newer single speed compact ratios. Currently my set up 34/16 and I like it pretty well. With all the riding from spot to spot across town I'd consider more top-end, but it's not overly important. Any input or opinions would be awesome. Thanks
SS ratio ?'s
- Thread starter JGill
- Start date
34/16 = 2.125
You can pretty easily go 12 on the back of a normal cassette hub, so....
12x2.125=25.5
26/12=2.16666666 <-----very close to the same gear you have now.
I have 27/12 on my 26" bike.
You can pretty easily go 12 on the back of a normal cassette hub, so....
12x2.125=25.5
26/12=2.16666666 <-----very close to the same gear you have now.
I have 27/12 on my 26" bike.
23/11! It's super!
Super LIGHT. Which is fine, if you want to spin your @ss off.
That's what I thought when I first set it up, but it's perfect for dirtjumps, park, and street.Super LIGHT. Which is fine, if you want to spin your @ss off.
...I don't want to spin my @ss off
2.25:1 is a real good ratio. Slightly higher than what you have now.
If you can go with a driver, 23/10 would be sweet.
Still paying for my 15 hours this semester so I will sticking with the cog and spacers... I am mostly concerned about riding over a mile between decent spots here in my town and don't want to feel anything like I'm riding a trials bike haha, I have spent enough time on those to last me for a long time. I'd rather carry enough speed to clear longer gaps rather than worry about the run up's on short approaches.
26/12 was what I was thinking anyways, so I may just stick with that. I'm still in a boot on my right foot and a wrap on my left foot for another 3-4 weeks so I have a little while to decide...
not that this will apply since im used to trials but i normally run a 22/19 for that so for street i run something like a 22/11 or 22/12 (im used to pedaling a lot)
25/9 is the way to go.
i'm digging 28x13 on my 26", but i'm going to a 12T soon for a bit more speed at the DJs.
I guess I'm weird. 23/11 feels spot on for everything. I can pedal through rhythm sets if I need to, and perfect for street and park. I can still get up hills and pedal all the way down hills.
that only works on a 20" wheel. (i assume you know that already....)
but for the newb readers:
The way to figure any gear ratio is:
Front Teeth divided by Rear Teeth, Multiplied by Wheel Diameter.
25 / 9 = 2.7
Then you multiply 2.7 times 20 = 55.5 55 is right about the magic SS number.
But, 25/9 on a 26" would be crazy hard.
2.7 X 26 = 70.2 . you will be hauling ass. the 20" equivalent in old school terms would be a 56 tooth sprocket with a 16t freewheel !!!!!!!!!
i'm running 30/14 on my MOB.
30/14 = 2.14. then 2.14 X 26" = 55.7. once again, really close to the magic 55. it's a little on the spinny side for long fast rides across town...but it's really good for DJ, skateparks and bmx tracks (quick acceleration out of the gate).
i have also run 36/16 on a 26" for powerful strokes and a faster ride.
36/16 = 2.25 X 26" = 58.5
once the number starts getting over 60, you're going to notice it being pretty tough on climbs or not being able to get a full crank rotation before hitting a jump or at a skatepark etc.
For a 26".... acceptable ranges for cross-town plus DJ/park/xc trails riding... IMO
24/11
25/11
26/12
27/12
28/13
29/13
30/14
31/14
32/15
33/15
34/15
34/16
35/16
36/16
Check out the empirebmx.com site for sprockets. TREE and PROFILE have good selections of sprocket sizes. Not sure if anyone makes a 31 or a 35.
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I just went from 33/16 to a 27/12 and am really liking the slightly bigger gear.
I opted for a 27-11 on my Tonic (24") and currently 26-9 on my T1 (20"). I really like having a bit more power for throwing in cranks, and I don't really do off road riding where I have to climb.
I thought my 20 had pretty high gearing @ 25/8, but I ran into a dude running 28/8 last week. 
30/13 on the suburban its 2 easy for me now but it has great top end and accel
i dropped a tooth in the rear this spring from 16 to 15, riding 33/15 and its cool, might want to drop another in the rear though... dont need to pedal our jumps at all.
32/11 on a 26"
I have one of those odyssey cogs. Ride it for two weeks and you'll get used to it. Then anything smaller feels like baby poo
I have one of those odyssey cogs. Ride it for two weeks and you'll get used to it. Then anything smaller feels like baby poo
aka soft....
i run a 58... 29 tooth tree sprocket w/a 13 tooth cog and 26s. I like it for everything except going uphill... lol. In the skatepark when i'm at speed, I still have some pedal resistance if I want to pedal... It works good for me.