Rims n stuff

tonyhumphreys
tonyhumphreys Posts: 6
in Road beginners
Hi,

Noob alert!!!

I've a Scott Speedster 20 Disc. Does me fine for what I do! Looking to get a spare wheelset so I can put on tyres more suited to rougher roads shout that take me fancy! I've got the original rims on and want to keep them with the Conti 4000ii on which I can't fault.

Thing is having seen so many wheelsets on eBay that look like they may fit I just need some advice as to how to decipher all the numbers 700c 28 622......etc...advice appreciated!

Thanks!

Tony

Comments

  • whyamihere
    whyamihere Posts: 7,716
    700c, 28" and 622 are all the same size wheels. Even more confusingly, so are 29"...

    700c is the size using the French system. 28" is used less nowadays, but would represent the nominal diameter with a tyre fitted. 29" is the same as 28", but is used for mountain bikes, so the wider tyres mean a larger nominal diameter, but this was mostly for marketing to try to prevent mountain bikers from realising they were using a road bike standard. 622 is the ISO measurement, which represents the diameter of the bit of the rim the tyres actually sit on (the bead seat diameter).

    The other thing to consider is the width of the rims. A wider rim allows you to use wider tyres. The image below gives a good indication of the width of rim that can support a given tyre size. Match the tyre size you want (left hand column) to the rim width (right hand column) and you're good.


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