Difference in tyre sizes

[Trigger369]

Can anyone tell me is there much of a difference in 700×25mm tyres and a 28mm tyre comfort wise .
Thanks

 

[vickster]

I’d say yes if you’ve got the clearance, and aren’t too fussed by a potential tiny loss of speed on smooth (UK ) tarmac

 

[wisdom]

I’d say yes if you’ve got the clearance, and aren’t too fussed by a potential tiny loss of speed on smooth (UK ) tarmac

I agree comletely however please tell me where I may find a smooth road in the uk

 

[Trigger369]

Northern Ireland roads are terribly rough and bumpy . There is a couple of rides I've done and I won' be taking them routes agian because of the state of the roads.
So would the only difference be speed. Does a 28 80m soak up some of the rough roads?

 

[SkipdiverJohn]

You're kidding yourself if you think a tiny 3mm increase in tyre width is going to make any meaningful difference in comfort.
If you want comfort you need a lot more air volume and lower inflation pressures, so you'd be looking at the sort of tyres normally fitted to commuting hybrids and tourers, not skinny road bike sizes!

 

[Vantage]

It's the lower air pressure in bigger tyres that add the comfort. A few less psi can make quite a difference.
Unless the road is billiard table smooth, a bigger tyre in most cases will be quicker than it's smaller counterpart. It's the tyres ability to roll over the rough surface rather than bouncing over it.

 

[Pumpkin the robot]

You're kidding yourself if you think a tiny 3mm increase in tyre width is going to make any meaningful difference in comfort.
If you want comfort you need a lot more air volume and lower inflation pressures, so you'd be looking at the sort of tyres normally fitted to commuting hybrids and tourers, not skinny road bike sizes!

It is not just a 3mm increase in width. Think about it.
I run one of my bikes on 25c tyres with 80psi front and 90 rear, Any lower and I get pinch flats. My commute bike runs 28c tyres, and I can run 60psi in those without any problems. the difference is night and day in comfort.

 

[tincaman]

25mm tyre contains 0.77l of air, 28mm is 1l, that's quite significant for comfort

 

[HLaB]

I've just put 28's on my spare wheels and there's delightfully plenty of clearance. The forks are claimed to accommodate 28mm + guards so I was pretty confident. Gives me the option to explore off the beaten track a bit more :-)

 

[Tangoup51]

Northern Ireland roads are terribly rough and bumpy . There is a couple of rides I've done and I won' be taking them routes agian because of the state of the roads.
So would the only difference be speed. Does a 28 80m soak up some of the rough roads?

The only difference would be your improved comfort and improved speed. - Yes, Improved speed, bouncing around helplessly does wonders to negate your power output - also swerving like a lunatic to find a comfortable line through the rough stuff is another way to damage your speed.

Alot of modern race bikes nowadays are coming with 28mm compatible framesets, it's a more popular tire size as we realise bigger, can often than not, be better.

 

[User6179]

Can anyone tell me is there much of a difference in 700×25mm tyres and a 28mm tyre comfort wise .
Thanks

Depends on the tyre, a supple side wall gives more comfort, for instance running a 25mm GP4000s at 100 psi will feel better than running a 28mm Mplus at 80 psi.

If you are light enough to run 25mm tyre at 80 psi then going upto a 28mm wont make much difference.

 

[si_c]

I noticed a small difference going to 28mm, but not life-changing.

If you can go to 32 you might notice a difference.

What you will notice, as already said is a higher TPI tyre with a more supple sidewall. Worth spending a bit extra on.

 

[bpsmith]

It takes a lot of confidence to drop the tyre pressures, and you feel silly when you finally “risk it”.

I always used to run 100psi with my 75kg body in 25mm tyres. Recently dropped them to about 85psi and thought they looked “flat” when sitting on the bike. Did a 25 mile test and they felt amazing and grip was as good or better. Just couldn’t look down at them whilst riding.

The tyres in question are Vittoria Corsa G+, so very supple sidewalls. Probably the gumwalls that made them look flatter.

 

[ianrauk]

It takes a lot of confidence to drop the tyre pressures, and you feel silly when you finally “risk it”.

I always used to run 100psi with my 75kg body in 25mm tyres. Recently dropped them to about 85psi and thought they looked “flat” when sitting on the bike. Did a 25 mile test and they felt amazing and grip was as good or better. Just couldn’t look down at them whilst riding.

This is what I did recently. I'm 75kgs and dropped the pressure from 110psi down to 90psi. Definitely more grip and a little bit more comfort with no loss of speed that I can see.

 

[Heltor Chasca]

I’ll side with @si_c on this. Having put 32s on my Audax bike, on routes where generally the lanes can be very agricultural. 75/80psi or even 70/75psi if it’s wet.

Never had a bruise on my hands or posterior. Would they fit?