Thread: Boma F-1 Build & Help.
View Single Post
Old 02-26-14, 08:56 PM
  #5  
ziqpy
Senior Member
 
ziqpy's Avatar
 
Join Date: Dec 2013
Location: England
Posts: 106
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by dynaryder;16530371for gearing,plug the numbers for your old bike into [url="http://sheldonbrown.com/gears/"
sheldon's calculator[/url],then compare to your new build. 53/26 with 20" wheels is fairly low,so you prolly won't have issues. You could always go with an 11-28 cassette if you need to get lower.
mph @ 40 rpm


[TABLE="width: 517"]
[TR]
[TD="class: Xl65, width: 47"]11-28[/TD]
[TD="class: Xl66, width: 47"]53[/TD]
[TD="class: Xl67, width: 47"]35.90%[/TD]
[TD="class: Xl66, width: 47"]39[/TD]
[TD="width: 47"][/TD]
[TD="class: Xl65, width: 47"]11-34[/TD]
[TD="class: Xl66, width: 47"]44[/TD]
[TD="class: Xl67, width: 47"]37.50%[/TD]
[TD="class: Xl66, width: 47"]32[/TD]
[TD="class: Xl67, width: 47"]45.50%[/TD]
[TD="class: Xl66, width: 47"]22[/TD]
[/TR]
[TR]
[TD="class: Xl66, width: 47"]11[/TD]
[TD="class: Xl68, width: 47"]10.6[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]7.8[/TD]
[TD][/TD]
[TD="class: Xl66, width: 47"]11[/TD]
[TD="class: Xl68, width: 47"]13.2[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]9.6[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]6.6[/TD]
[/TR]
[TR]
[TD="class: Xl67, width: 47"]9.10%[/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[TD][/TD]
[TD="class: Xl67, width: 47"]18.20%[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[/TR]
[TR]
[TD="class: Xl66, width: 47"]12[/TD]
[TD="class: Xl68, width: 47"]9.7[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]7.1[/TD]
[TD][/TD]
[TD="class: Xl66, width: 47"]13[/TD]
[TD="class: Xl68, width: 47"]11.1[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]8.1[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]5.6[/TD]
[/TR]
[TR]
[TD="class: Xl67, width: 47"]8.30%[/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[TD][/TD]
[TD="class: Xl67, width: 47"]15.40%[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[/TR]
[TR]
[TD="class: Xl66, width: 47"]13[/TD]
[TD="class: Xl68, width: 47"]8.9[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]6.6[/TD]
[TD][/TD]
[TD="class: Xl66, width: 47"]15[/TD]
[TD="class: Xl68, width: 47"]9.6[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]7[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]4.8[/TD]
[/TR]
[TR]
[TD="class: Xl67, width: 47"]7.70%[/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[TD][/TD]
[TD="class: Xl67, width: 47"]13.30%[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[/TR]
[TR]
[TD="class: Xl66, width: 47"]14[/TD]
[TD="class: Xl68, width: 47"]8.3[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]6.1[/TD]
[TD][/TD]
[TD="class: Xl66, width: 47"]17[/TD]
[TD="class: Xl68, width: 47"]8.5[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]6.2[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]4.3[/TD]
[/TR]
[TR]
[TD="class: Xl67, width: 47"]7.10%[/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[TD][/TD]
[TD="class: Xl67, width: 47"]17.60%[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[/TR]
[TR]
[TD="class: Xl66, width: 47"]15[/TD]
[TD="class: Xl68, width: 47"]7.7[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]5.7[/TD]
[TD][/TD]
[TD="class: Xl66, width: 47"]20[/TD]
[TD="class: Xl68, width: 47"]7.2[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]5.3[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]3.6[/TD]
[/TR]
[TR]
[TD="class: Xl67, width: 47"]13.30%[/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[TD][/TD]
[TD="class: Xl67, width: 47"]15.00%[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[/TR]
[TR]
[TD="class: Xl66, width: 47"]17[/TD]
[TD="class: Xl68, width: 47"]6.8[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]5[/TD]
[TD][/TD]
[TD="class: Xl66, width: 47"]23[/TD]
[TD="class: Xl68, width: 47"]6.3[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]4.6[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]3.1[/TD]
[/TR]
[TR]
[TD="class: Xl67, width: 47"]11.80%[/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[TD][/TD]
[TD="class: Xl67, width: 47"]13.00%[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[/TR]
[TR]
[TD="class: Xl66, width: 47"]19[/TD]
[TD="class: Xl68, width: 47"]6.1[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]4.5[/TD]
[TD][/TD]
[TD="class: Xl66, width: 47"]26[/TD]
[TD="class: Xl68, width: 47"]5.6[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]4[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]2.8[/TD]
[/TR]
[TR]
[TD="class: Xl67, width: 47"]10.50%[/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[TD][/TD]
[TD="class: Xl67, width: 47"]15.40%[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[/TR]
[TR]
[TD="class: Xl66, width: 47"]21[/TD]
[TD="class: Xl68, width: 47"]5.5[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]4.1[/TD]
[TD][/TD]
[TD="class: Xl66, width: 47"]30[/TD]
[TD="class: Xl68, width: 47"]4.8[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]3.5[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]2.4[/TD]
[/TR]
[TR]
[TD="class: Xl67, width: 47"]9.50%[/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[TD][/TD]
[TD="class: Xl67, width: 47"]13.30%[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[/TR]
[TR]
[TD="class: Xl66, width: 47"]23[/TD]
[TD="class: Xl68, width: 47"]5.1[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]3.7[/TD]
[TD][/TD]
[TD="class: Xl66, width: 47"]34[/TD]
[TD="class: Xl68, width: 47"]4.3[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]3.1[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]2.1[/TD]
[/TR]
[TR]
[TD="class: Xl67, width: 47"]13.00%[/TD]
[TD][/TD]
[TD][/TD]
[TD="class: Xl70"][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="class: Xl66, width: 47"]26[/TD]
[TD="class: Xl68, width: 47"]4.5[/TD]
[TD="class: Xl69, width: 47"][/TD]
[TD="class: Xl68, width: 47"]3.3[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[/TABLE]

[TABLE="width: 188"]
[TR]
[TD="class: xl66, width: 47"]11-32

15.80%[/TD]
[TD="width: 47"][/TD]
[TD="width: 47"][/TD]
[TD="class: xl69, width: 47"][/TD]
[/TR]
[TR]
[TD="class: xl65, width: 47"]22[/TD]
[TD="class: xl67, width: 47"]5.3[/TD]
[TD="class: xl68, width: 47"][/TD]
[TD="class: xl67, width: 47"]3.9[/TD]
[/TR]
[TR]
[TD="class: xl66, width: 47"]13.60%[/TD]
[TD][/TD]
[TD][/TD]
[TD="class: xl69"][/TD]
[/TR]
[TR]
[TD="class: xl65, width: 47"]25[/TD]
[TD="class: xl67, width: 47"]4.6[/TD]
[TD="class: xl68, width: 47"][/TD]
[TD="class: xl67, width: 47"]3.4[/TD]
[/TR]
[TR]
[TD="class: xl66, width: 47"]12.00%[/TD]
[TD][/TD]
[TD][/TD]
[TD="class: xl69"][/TD]
[/TR]
[TR]
[TD="class: xl65, width: 47"]28[/TD]
[TD="class: xl67, width: 47"]4.2[/TD]
[TD="class: xl68, width: 47"][/TD]
[TD="class: xl67, width: 47"]3.1[/TD]
[/TR]
[/TABLE]


Both cassettes pretty close. You can tell the difference between the 29er vs 20

Sure my rockhopper was a 26", but going on latest model. Dunno the RPM vs good speed, what do you think?

so basically do you shoe horn in a 135 hub? or squeeze the frame onto a 130?
Last edited by ziqpy; 02-26-14 at 09:15 PM.
ziqpy is offline  
Reply