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Monster Tires?(3 posts)

Monster Tires?Skidoo
Nov 12, 2002 7:32 PM
I ride a '00 Schwinn Peloton road bike with dual pivot ultegra brakes and open pros- no chainstay bridge and no fancy wishbone seatstays. What are the widest, gnarliest tires that I can safely ride?
I want a pseudo-cyclocrosser that I can take on dirt & gravel trails.
All suggestions welcome
the determining factorlaffeaux
Nov 13, 2002 2:44 PM
The widest tires that you can use are determined the clearance you have a inside the break calipers, in your fork, and between your seat stays. Ultegra brakes will not allow much more than a 28mm tire to go through. You might be able to get a slightly larger tire through the brakes if you inflate it after you install it, and are willing to take out the air to remove your wheels.

Many frames do not have enough clearance on the fork or chain stays to run wide tires. Look at the clearance between your tire and rear stays, and judge how much room you have. If you really are thinking about cyclocross think about how much mud would pass through the opening. I'll bet the tire would not be very wide.
Take a measurementKerry
Nov 13, 2002 5:28 PM
Most likely pinch points are rear brake bridge and fork. Determine your current gap, define your minimum clearance (2 mm is not much!), and then add 2X the difference to your current tire size. For example, 23 mm tires, 5mm current gap, says you can go to 28.