Tyres for 20mm rims.

[Willam]

hi, need a new tyre, ATM I have 700-40c on, the internal of the rim is 20mm, am I right in saying that 35mm is the smallest I can go?

 

[Banjo]

My Mavic 19 mm rims are only supposed to go down to 28 c tyres but I have successfully done a few thousand miles on 25c tyres.

I would say you could use 32c without worry.

http://www.sheldonbrown.com/tire-sizing.html

 

[Willam]

Thanks, thought I might have got it wrong as when looking to buy a new tyre, they all seems to be below 30mm at around 25 mm.

 

[Banjo]

32c is a nice size tyre . Big enough for comfort without too much unnecessary weight.

 

[Alan O]

32c is a nice size tyre . Big enough for comfort without too much unnecessary weight.

Pretty much the same as the 27 x 1 1/4 that we old fogeys have been riding for decades - who'd have thought it?

 

[Tangoup51]

I've ran 25, 28, 32 and 42c on my mavic 19mm. All with equal degree of success in terms of "mounting"

I'd say don't go less than 28mm. - Not for mounting reasons, but for sheer comfort reasons. There's literally no speed penalty for going bigger than 25-28. I used a 32c tire over those two. - I tested and concluded if you spend good on your 32c tires you'd get same/better speed performance of a smaller tire size. - Oh and the mountains of comfort that follows.

Though, I recently switched to 42mm tires which are about 800 grams heavier than my 32c tires - (400 per wheel) but the weight penalty from 25-28c was only 150 grams per wheel. Sadly, it's hard to find tires past 35c that aren't orientated at Puncture resistance or Off-roading, so they're generally heavier.

That said, I'd recommend these Heavily http://www.chainreactioncycles.com/vittoria-zaffiro-pro-road-bike-tyre/rp-prod109595 < select the 32c option

On sale right now and they're insane value for money given the weight (<290g) puncture resistance, grip and durability.

 

[sleuthey]

32c is a nice size tyre . Big enough for comfort without too much unnecessary weight.

+1

 

[Willam]

I've ran 25, 28, 32 and 42c on my mavic 19mm. All with equal degree of success in terms of "mounting"

I'd say don't go less than 28mm. - Not for mounting reasons, but for sheer comfort reasons. There's literally no speed penalty for going bigger than 25-28. I used a 32c tire over those two. - I tested and concluded if you spend good on your 32c tires you'd get same/better speed performance of a smaller tire size. - Oh and the mountains of comfort that follows.

Though, I recently switched to 42mm tires which are about 800 grams heavier than my 32c tires - (400 per wheel) but the weight penalty from 25-28c was only 150 grams per wheel. Sadly, it's hard to find tires past 35c that aren't orientated at Puncture resistance or Off-roading, so they're generally heavier.

That said, I'd recommend these Heavily http://www.chainreactioncycles.com/vittoria-zaffiro-pro-road-bike-tyre/rp-prod109595 < select the 32c option

On sale right now and they're insane value for money given the weight (<290g) puncture resistance, grip and durability.

Cheers for that, order some thanks.

 

[Vantage]

I went from 32 to 35 and now running the 38mm version of these with no loss in speed and much more comfort.
There's an entire thread several pages long on the cyclinguk forum dedicated to just how good these tyres are.
I wouldn't want to ride anything else. It'll be a sad day in hell when production ceases.

https://www.planetx.co.uk/i/q/TYVIVOHY/vittoria-voyager-hyper-folding-tyre

 

[Tangoup51]

I went from 32 to 35 and now running the 38mm version of these with no loss in speed and much more comfort.
There's an entire thread several pages long on the cyclinguk forum dedicated to just how good these tyres are.
I wouldn't want to ride anything else. It'll be a sad day in hell when production ceases.

https://www.planetx.co.uk/i/q/TYVIVOHY/vittoria-voyager-hyper-folding-tyre

t's a shame they don't go up to atleast 42c because there's a market for 40mm+ fast commuting tires that focus on Weight/Feel/Grip over puncture resistance.
I had to settle with heavy conti tires in the end.
I feel the same about the rubino/zaffiro pro editions, Vittoria sure know how to grab a loyal customer base.

 

[Willam]

Order came today, really pleased with it so put in another order but it was a bugger to put on, got the folding type as none of the others in stock, is there a knack to putting on a folding tyre?

 

[Tangoup51]

Order came today, really pleased with it so put in another order but it was a bugger to put on, got the folding type as none of the others in stock, is there a knack to putting on a folding tyre?

Not really. Not as opposed to a wired tire, they're all the same to me. Except the folding is generally lighter and more flexible.

just hook one side of the tire bead onto your rim.
Insert your tube
Then close the other bead down.

It's worth mentioning if you're using tubes that fitted your old tire size you might find that making it harder than it needs to be.

I recommend http://www.chainreactioncycles.com/vittoria-lite-inner-tube/rp-prod144369

I always buy light innertubes for grip reasons, less rubber means the tire can react quicker with the road surface. Mine went on average with these, not exceptionally hard or exceptionally easy.

In hindsight I wish I could of sold you my Set of vittoria zaffiro pro 32c and the innertubes, As I say, i'm experimenting with tire sizes and won't be coming back to the Zaffiro 32c for some time while i'm doing offroading with the 40c contis. - The zaffiros are brand new too.


But anyway i'm glad you're happy with these tires and I have alot of confidence that you'll enjoy them flawlessly once your up and running.

 

[Willam]

Cheers, thinking about it, i was in a rush, so was trying to put both sides on at the same time and the inner tube!