[aaronrocker]

first five minutes at the park yesterday and my first pedal grind of the day and i missed my pedal. proceded to slam straight on my sprocket and heres the resulting carnage, good news is i get an excuse to go parts shopping

ps. can anyone post the gear calculator up or pm it to me, wanting to try different gearing

 

[Axis]

get a crescent wrench and bend them back. That is def not the chainwheel for grinding.

 

[sittingduck]

Ouch... Those things aren't cheap, either! Maybe get one with a bash guard next time!
http://www.ridemonkey.com/forums/showthread.php?t=217876

 

[quickneonrt]

what gearing are you running now? 28x13 is same as 26x12 on a 26" wheel

 

[sittingduck]

If you want the .xls file for the chainstay calculator, I have it here: http://huckit.net/pub/chainlength.zip

 

[eaterofdog]

Time to get an Animal chainwheel with a guard.

 

[Stoked]

tree!

 

[aaronrocker]

still dont know if i want to go with a bolt on guard or something like the macneil offers with the 360 degree gaurd built in. ahh the decisions of life

 

[aaronrocker]

when i am looking at gear ratio, gain ratio, and gear inches, which one refers to pedaling effort(for lack of a techical term)

 

[sittingduck]

Not sure about gain ratio, but the gear ratio is simply the exact reduction that the different gears give. Divide the front by the back, very simple.
I think gear inches attempts to calculate just how far you will travel with one revolution of your cranks. It takes the gear ratio and then factors the wheel size. 55 or so is about the norm, I prefer right around 60.

http://sheldonbrown.com/gain.html

 

[aaronrocker]

so which of the two would be how quick your crank spins it is to pedal? to say if you had a gear like a 46/16 being hard to pedal or a 25/9 easy to pedal? im just trying to match it up with my twenty inch as much as possible, which is 25/9 180 cranks and my mtb which is currently harder to pedal at a 28/12 175 cranks, i think i want to go with a 33 front but not sure which ratio im supposed to go off of?

 

[sittingduck]

Do the math, and the higher the number, the harder it will be to pedal.
46/16 = 2.875
If you want to compare 20" to 26", you will need to do the gear inches, since it takes wheelsize into account.
25/9 on 20" is 55.6 gear inches.
33/15 on 26 w/175mm is 57.2
calculated with (nominal) tire sizes here: http://software.bareknucklebrigade.com/rabbit.applet.html
33/15 with 44 full links will give you a chainstay of 15.94" Subtract (or add) 1/2" for a full link, 1/4" for a half link.

 

[aaronrocker]

thanks bro, i guess your right, ive got some math to do

 

[aaronrocker]

math done, ima be runnin a 26/12 animal with a gaurd, only one i can find with a gaurd and 26t, ill see how that works out

 

[sittingduck]

math done, ima be runnin a 26/12 animal with a gaurd, only one i can find with a gaurd and 26t, ill see how that works out

Cool, if you like 25/9 on your 20, you will like 26/12 on 26. Should be real close.

 

[aaronrocker]

yea, i can hope it feels the same at least. trying to get them set up similar so its not so hard to switch between the two

 

[quickneonrt]

Time to get an Animal chainwheel with a guard.

Odssey and McNeil make chainrings with guards also

 

[BeastMode]

Tree OG. Imperials are to weak.

 

[eaterofdog]

Odssey and McNeil make chainrings with guards also

Yeah I just like the animals mini guard and it comes in all sizes.