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Tyres n Tubes

by Gkam84
Mon, May 02, 2011 23:48
7

Right, after some advice on here, i took my winter bike on some rougher terrain, turns out it handles just as well as on the road, Now for the problem

I'm planning a trek on it so i thought i better get a new set of tyres and some spare tubes incase i'm in the middle of nowhere and something happens

But, i normally just go to the local bike shop and they hook me up, whenever there is something wrong, i dont mind paying the stupidly high prices because its normally something i need done there and then

With a no time scale for my trek set, i thought i'd shop around online to get a better deal, finding certain reputable shops have ebay accounts and are selling things cheaper there, i made a list and got most things

Just stuck on tyres and tubes, i know my wheels are 28mm and are 700's, the tubes are presta valve as you would expect

So i thought a simple 700x28 would find me what i needed, but i thought i'd better ask before investing because i keep coming upon different things, like

Quote:

Innertube 700 X 25/28c
To fit bikes with 700 x 25 to 28c tyres

Quote:

700x28 and 27x1-1.4

Quote:

Suitable for 700/28" tyres from 28C to 35c

A little confused, i know if i go to a normal online store i could just pick a 28mm tyre and be pretty sure about it, but they are quite a bit cheaper on ebay and i need to keep costs down because of my finances and because i said i wouldn't spend money on my winter bike outside of winter 1 Hope someone can help and explain

If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.

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7 comments

Avatar
Gkam84 | 13 years ago
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Cheers folks, i've got a handle on things now

Got tyres and tubes sorted, so now just to plan where i'm going

Avatar
KirinChris | 13 years ago
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But you can get winter stuff cheaper outside of winter, or something like that... 4

Yes you should be fine fitting the 30mm tyres on your rims.

Are they actually 28mm rims - is that the ETRTO number on the rim ? (It will be a two digit number and a three digit number, probably xx-622). That specifies the distance between the bead rims across the rim diameter and the shorter number is the width between the sides.

At any rate, even if you can't find a specification you should be fine. A rule of thumb is that any rim can be mounted with a tyre up to 1.5 times the width. If you've had 28mm tyres an extra 2mm won't make much difference.

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Gkam84 | 13 years ago
0 likes

Thanks Miffed

So i went for Dr Sludge 700 x 28/35 inner tubes in the end on the advice of a friend.

Got some tyres aswell, after i explained the trip to the g/f she now wants to come along and has broken the "we shouldn't spend money on our winter bikes outside winter rule"

So i have got
Schwalbe Marathon 700x28c
Schwalbe CX Pro Cyclo Cross 700x30

Am i alright fitting the CX Pro's on my 28mm wheels? I know i have plenty of clearance brakes wise

Avatar
Simon E replied to Gkam84 | 13 years ago
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Gkam84 wrote:

So i have got
Schwalbe Marathon 700x28c
Schwalbe CX Pro Cyclo Cross 700x30

Am i alright fitting the CX Pro's on my 28mm wheels? I know i have plenty of clearance brakes wise

Both should be fine on a standard rim.

As for tubes I'd check Schwalbe's recommended inner tube for their tyres:
http://www.schwalbe.co.uk/shopdata/files/Bike2011-ENG.pdf
On page 61 it lists all their tyres and the appropriate inner tube for each.

You could cross-reference this with the inner tubes on page p48 or you could stop fretting and just go for a good quality inexpensive inner tube like the Nutrak 700 x 25-32c, £2.50 each at Parker.

Avatar
miffed | 13 years ago
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It's all about stretch of the inner tube. At a push you can over inflate any tube with the correct radius eg a 700 x 23 could fill a 28 tyre but you're going to more likely puncture cause it's over inflated. On the other hand you can under fill bigger tubes for skinnier tyres but the excess rubber makes pinch punctures more likely and there's definitely more faffing with getting the on. I'd have thought any of the 28s should work and its manufactures just havig different ways
of presenting the same info. Id buy the more expensive tubes (contis are my tube of choice ATM) cause cheaper tubes are a false ecconomy.

Hope that's clear as mud

Avatar
Gkam84 | 13 years ago
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Thanks, but i'm not looking for recommendations on tyres, i already have gatorskins on my normal bike

I'm looking for help on sizing tyres so i'm not stuck with shopping from online stores who's tyres i can find cheaper from their ebay stores

Its mostly going to be rough gravel and dirt paths, so looking at something with a little more grip

The other thing i forgot to ask, if i use a 28 tube, i guess this means i have to use a 28 or larger tyre? but if i dropped to a 25 tube, could i use a 25 tyre?

Avatar
spongebob | 13 years ago
0 likes

On road or off road?!

If its on road just head to: http://www.wiggle.co.uk/continental-ultra-gatorskin-road-tyre-and-tube-set/

Just select the 700c x 28

2 tyres and the tubes, and you probably will not get a puncture. (Currently I'm 1 puncture and 700 miles)

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