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Taking care of bike tyres

Get the correct size tyre


The markings on a tyre sidewall are to an internationally recognized standard called ISO - there are two numbers (eg 37-622). The first number refers to the section of the tyre, the second is the bead diameter in mm. An imperial equivalent is often shown. Make sure you know what size tyre you need before asking your shop for a replacement.


Tyre widths vary greatly. MTB tyres are available in sizes up to 2.3 in wide. A tyre like this offers a shock absorbent aspect needed for the rigours of off-road riding. By contrast road race bikes need to cheat the wind with narrow tyres. A 20mm tyre is popular, though 25 mm tyres, which provide greater comfort for long spells in the saddle, are the popular choice of many cycle tourists.


Get the pressure right


Tyres lose air, so be prepared to inflate. Latex tyres are particularly prone to go down between rides as they are porous. Give your tyres a squeeze before you go for a ride and …. If in doubt check their pressure with a gauge. Be careful not to exceed the recommended limit, and always follow the manufacturer's suggested pressure.

Puncture repairs


Puncture repairs are straightforward if they are due to an intrusion such as a thorn, but those caused by impact - sometimes called a pinch flat - are difficult, if not impossible, to repair.

Here's how to identify an no-hoper and fit a new inner tube.

  • The inner tube has a snakebite puncture and is beyond repair. It's been caused by the tube compressing into the rim. Latex tubes, however, are almost always repairable.
  • Remove the tyre and tube then carefully inspect the bed of the rim for sharp objects and any protruding spokes. Replace the rim tape if it's damaged.
  • Fit one side of the tyre over the well of the rim. Inflate the tube so that it is firm, then place the valve through the hole.
  • Working from waist height downwards, work the bead of the tyre over the rim using your thumbs.
  • Use your thumbs to manipulate the tyre over the inner tube.
  • Inflate the tyre to seat the bead. Do this slowly and check that the tyre bead isn't bulging out anywhere.
  • Finally, inflate to the recommended pressure.
Tips
  • If you are getting ready for a race it's as well to inspect the inner tube, as an unstuck patch can wreak havoc on your chances
  • If you were riding fast at the time of the puncture, examine the sidewall of the tyre for damage

 

  Health & Fitness Tips
  Basic Riding Skills
  Tips on Safe Cycling 
  Taking Care Of Bike Tyres
  Choosing Tyres for Bike Safety
  Riding Techniques For Cross-Country Biking

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