What does the wheel sizes mean?

by Sumith   May 3, 2012  

I have a Mongoose Maurice which has a wheel size of 700x18c/23c. I tried putting on a 28c schwalbe marathon plus tyre on it (which fitted on, but doesn't look ok). My tire fitting ordeal is prompting this question.

I already have a separate thread about my MM bike.

What is the max & min size that my wheel can take? on the rim, it says 700x18c/25c? Was it a good idea to put a 28c tire on?

I have the 28c on front tire and it is bulging out from the rim (I mean, the tire beads are completely inside the rim but the tire is bulging out compared to the 25c I had earlier)

Please advice...

4 user comments

Oldest firstNewest firstBest rated

the 700 is the rim size, the 23 is the tyre width.

posted by russyparkin [579 posts]
3rd May 2012 - 23:07



the rim size is 700 x 18c/23c

posted by Sumith [9 posts]
4th May 2012 - 12:58


I think you'll find


is either an indication of minimum & maximum tyre sizes suitable (unlikely) - or inner/outer rim width

Take a look here for more info on wheel/tyre sizes


Buddha said:

Believe nothing, No matter where you read it,
Or who has said it, Not even if I have said it,
Unless it agrees with your own reason
And your own common sense.

mad_scot_rider's picture

posted by mad_scot_rider [555 posts]
4th May 2012 - 13:51

1 Like

take the rim width (internal)

min tyre size = 1.4x this
max tyre size=2.1x this

so for yer average 15mm rim min= 21mm tyre, max=31.5

in practice you can push it a bit.

as always:


posted by wyadvd [123 posts]
5th May 2012 - 11:15