Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  

Go Back   > >

Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

User Tag List

Thread Tools Search this Thread
Old 10-28-10, 05:38 AM   #1
Senior Member
Thread Starter
djpfine's Avatar
Join Date: Jul 2010
Bikes: Wilier Izoard, Tricross FG
Posts: 241
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Tire clearance...there must be an easier way

Is there an easy way to tell the maximum width of tires a bike can take just by looking at the specs? I'm considering a number of SS/FG bikes right now and have no way to judge this short of visually inspecting them in person at each LBS, and even then I don't trust my eyeballs.

For example, I'm looking at an Origin 8 Uno and its specs list a 1 1/8" fork, 700x32 wheels, and 700x26 tires. Does this mean that I can only fit tires less than 1 1/8" thick, or can I at least go up to a 32 since the factory rims are already that size?

In addition, what about the brakes? Other BF posts favor cantilever brakes over calipers for tire clearance. How can I tell what fits certain brakes?
djpfine is offline   Reply With Quote
Old 10-28-10, 06:54 AM   #2
the barbarian
xdrmusclex's Avatar
Join Date: Jan 2007
Location: Evanston, IL
Bikes: Independent Fabrications Crown Jewel, Surly Steamroller(FG), Abici Podium (road)
Posts: 324
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
the stock tires are 26c, not 32 (there are 32 spokes in each wheel). Without knowing the width of the fork and spacing of the seatstays, or the manufacturer sayuing the max width of the tires, it is tough to tell. One indication that wider tires are possible would be cantilever brakes (usually found on MT bikes, cross bikes or touring bikes), or long reach calipers (like is required for the surly steamroller as wider tires are generally taller as well and require more clearance. I would guess you could not fit 32's on the Uno, maybe up to 28's
xdrmusclex is offline   Reply With Quote
Old 10-28-10, 08:09 AM   #3
Senior Member
chas58's Avatar
Join Date: Jul 2010
Location: Michigan
Bikes: too many of all kinds
Posts: 2,505
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 324 Post(s)
When I put big tires on, I often get surprised at the places it rubs that I dont' expect.
My solution: have the LBS take a larger tire off another bike and see where it hits.

some areas to look for:
I have clearance in my fork, but have had to dremmel brake calipers to get tires to clear them also.
Front derailer may have contact as it moves - obviously not a problem for a SS/FG
Rear clearance is going to be determined by your gearing, chain, and how far back wheel is in the dropout. I typically can put a pretty big tire on there with the right gearing & chain length.

Really, trial and error is the only way. Besides, a 32mm tire isn't always a 32mm tire. The written size of a tire is only a guideline...
chas58 is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

All times are GMT -6. The time now is 10:16 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    get answers from real people!
Click to start entering your question.