Builder's Spotlight The Paceline Forum Builder's Spotlight


Go Back   The Paceline Forum > General Discussion

Reply
 
Thread Tools Display Modes
  #1  
Old 12-16-2018, 12:19 AM
fiamme red's Avatar
fiamme red fiamme red is offline
Senior Member
 
Join Date: Jan 2005
Location: America's biggest shopping mall
Posts: 10,009
Neat tool for checking tire clearances on your bike

https://janheine.wordpress.com/2018/...ire-fit-gauge/

https://www.compasscycle.com/shop/co...ire-fit-gauge/

Quote:
How wide a tire can I fit on this bike? It’s a common question, especially when converting a bike from one wheel size to another. Hahn Rossman’s Tire Fit Gauge eliminates the guesswork: One end hooks over an axle placed in the dropouts. The other end has slots for three wheel sizes: 559 mm (26”), 584 mm (650B) and 622 mm (700C). Discs that represent different tire widths fit into the slots: 23, 34, 38, 42, 48 and 54 mm. Slide a disc into the slot for a rim diameter, and rotate the gauge around the axle to check the clearances for this tire size all around the frame.

Designed for 13 mm dummy axles in frame jigs, the Tire Fit Gauge can be used with other axles if their diameter is increased with a few layers of tape.

The gauge is laser-cut from plastic. Remove protective cover before you use it.

Made in the USA.
__________________
It don't mean a thing, if it ain't got that certain je ne sais quoi.
--Peter Schickele
Reply With Quote
  #2  
Old 12-16-2018, 07:38 AM
oldpotatoe's Avatar
oldpotatoe oldpotatoe is offline
Proud Grandpa
 
Join Date: Oct 2009
Location: Republic of Boulder, USA
Posts: 34,830
Or...2 tablespoons are about what, 42mm?

Just guessing actually a pretty good idea.
Attached Images
File Type: jpg eight-different-sized-measuring-spoons-F8MR92.jpg (14.0 KB, 420 views)
__________________
Chisholm's Custom Wheels
Qui Si Parla Campagnolo
Reply With Quote
  #3  
Old 12-16-2018, 08:52 AM
fmradio516 fmradio516 is offline
Senior Member
 
Join Date: May 2010
Location: Boston
Posts: 865
thats cool. better than buying a set of tires to try them on only to find out they dont fit.
Reply With Quote
  #4  
Old 12-16-2018, 09:18 AM
Veloo's Avatar
Veloo Veloo is offline
Senior Member
 
Join Date: Sep 2013
Location: Toronto
Posts: 1,694
But why the gap between 23 and 34?
Doesn't a builder want to know if a frame can clear 28 or 32?
Reply With Quote
  #5  
Old 12-16-2018, 09:22 AM
BassoBry BassoBry is offline
Member
 
Join Date: Apr 2015
Location: Pittsburgh
Posts: 45
I like the idea, but what about the many varying tire/rim combos?
Reply With Quote
  #6  
Old 12-16-2018, 10:29 AM
Blue Jays Blue Jays is offline
Rock Hard ~ Ride Free
 
Join Date: Oct 2007
Location: United States of America
Posts: 3,668
If fit is questionable it seems easier to have a pair in your tire stock (or borrow from a pal) to physically check to be 100% certain.
Reply With Quote
  #7  
Old 12-16-2018, 11:05 AM
Bob Ross's Avatar
Bob Ross Bob Ross is offline
Registered (ab)User
 
Join Date: Apr 2007
Location: NYC
Posts: 2,909
Quote:
Originally Posted by Blue Jays View Post
If fit is questionable it seems easier to have a pair in your tire stock (or borrow from a pal) to physically check to be 100% certain.
Empiricism FTW!!!
Reply With Quote
  #8  
Old 12-16-2018, 11:36 AM
lhuerta lhuerta is offline
Senior Member
 
Join Date: Feb 2004
Location: NY, NY
Posts: 1,616
....unless u can get all tire manufacturers to make tires consistent with size stamped on sidewall (including profile size), then this tool is useless. Great effort, tho....
Reply With Quote
  #9  
Old 12-16-2018, 11:53 AM
MaraudingWalrus MaraudingWalrus is offline
Senior Member
 
Join Date: Oct 2014
Location: Cocoa Village, FL
Posts: 1,108
I'm not sure it's totally useless. I think it might be useful to know if you're considering a wheelsize swap, as he states. If you're wondering about feasibility of a wheel size change (700x23 to 650b x something) then this might be a useful gauge that allows eliminating of the possibilities. I don't think it'll guarantee fit, but it might guarantee not fitting.
Reply With Quote
  #10  
Old 12-16-2018, 02:06 PM
xnetter xnetter is offline
Senior Member
 
Join Date: Feb 2017
Location: Victoria, BC
Posts: 160
This tool is for framebuilders that want to measure tire clearance while working on tube layup in the jig. Hahn is an accomplished framebuilder - I doubt he would develop and then market a useless device.

KJ

Last edited by xnetter; 12-16-2018 at 02:09 PM.
Reply With Quote
  #11  
Old 02-11-2019, 09:36 PM
MaraudingWalrus MaraudingWalrus is offline
Senior Member
 
Join Date: Oct 2014
Location: Cocoa Village, FL
Posts: 1,108
A friend of mine took dimensions of the sized pucks, and created and scaled cad designs for different sizes. I think it's scale-able to any size? Not sure.

I think he uploaded it to thingiverse. Once I find that link, I'll update it here.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 12:51 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.