Gear Ratios....some Mathematics

[XPbIM3]

just cant choose what gear ratio to go on

now iam using 21/18(=1.16666) on 170mm

but may switch to 22/18(=1.22222) or maybe buy some 175mm cranks and go 22/18(it will be like a 1.1873 gear on 170mm cranks)

So the questons are:

Does anybody uses a 22/18 gear ratio with 170mm cranks? & how high/long is your pedal kick?

What is yours recomendations to me? what gear to use?

[Mike W]

use a 18 tooth freewheel and a 12 tooth screw on sprocket thats the most common one and the one im using

mike.

[aener]

I run 22:18.

However, I've not been biking all that long - about 4 weeks in total (2 weeks before, and 2 weeks after I'd broken my ankle)

At the minute - I'm getting about 22" high as my sidehop limit (vertical)

About 2.5-3' (feet) across pedal kick (I call them lurches?),

And pedal hoping (to me - lurch again ) up is about 12"

I'm on a T-Pro incase you wanted to know

I couldn't tell you what length my cranks are, I just bought them

Can you say if these heights are about normal for my time? Bearing in mind I broke my right ankle and I'm right foot forward so I'm a bit weaker (still re-strengthening)...

I'm a bit worried I'm falling behind , as I have no-one to bike with in my area, I can't compare. (Anyone around the Loughborough area, give me a shout on msn: flipp1@hotmail.co.uk)

I'd say the ratio is very nice to ride, I love it...

Go for it

Any help?

Flipp

EDIT: 22t sproket is on cranks, 18t is rear freewheel.

Edited September 6, 2006 by Flipp

[yoyoyo]

Check Danny's sig.

Think it's Danny, he has a gear ratio calculator thingy.

[weewillywinky]

i'd go with t-comp-mike guy. go for around the 1.5 ratio mark although thats not a ratio it's self but the sum of. i ride thats and it's the nicest i think.

is a gear ratio calculator thingy not just a normal calculator, or am i being naive. never seen or heard of one, sorry

Edited September 6, 2006 by weewillywinky

[Mr Motivator]

22:18 or 16:13 with 170mm cranks. ONLY way to go.

Edited September 6, 2006 by member1495

[threesixty]

i run 20:16 on 165mm. seems good for me

[lankyri]

i run 18 16 on 165mm and to be honest since i got my pro 2 i find it harder to gap so im actually thinkin of changing my ratio but dont know what to have i wanna keep the 18 on the front, but i dont want a to easy gear as my bike is the only transportation i really have

[XPbIM3]

use a 18 tooth freewheel and a 12 tooth screw on sprocket thats the most common one and the one im using

you are talking about mod, arent you?

Can you say if these heights are about normal for my time? Bearing in mind I broke my right ankle and I'm right foot forward so I'm a bit weaker (still re-strengthening)...

in that case you results arnt bad, keep training

i wish you will recover you ankle completly

EDIT: 22t sproket is on cranks, 18t is rear freewheel.

freewheel on hub - same config as i have =)

thanx everyone

it seems i have to try 22-18 and maybe get used to it to say exactly will my gap increese or decreese...