Should I buy 25c tyres for 95kg weight?

[MrWill]

Trashed my Gatorkins 23c riding over a smashed bottle.

I think I'd like to try the GP4000S, but 23c or 25c?

Either are lighter than the Gatorskin which I ran at 115psi, which did not really have any probs with. But never have been confident on the grip of them in the wet.

 

[HLaB]

Conti GP4000s grip better than gator whatever the width. 25mm tyres perform the same as 23mm on speed and marginally better on grip and comfort, I think the 25mm would be my choice.

 

[MrGrumpy]

rode 23c at your weight for long enough, never thought any different, the only difference we have to run at max pressure. I now have 25c on my new bike and the ride for me is not quite as harsh but I`m comparing apples and oranges here. Could be the new bike or it could be the tyres. The Pro`s are supposed to be moving over to 25c from what I read, I think from my early experiences I would move to the larger size myself if they fit in the frame.

 

[hoski]

It probably doesn't matter - but I'd go for 25c. Marginally more comfortable and no real difference in rolling resistance - if you intend to spend a lot of hours in the saddle the tiny gain in comfort with 25c over 23c makes a huge difference.

 

[SatNavSaysStraightOn]

assuming you have the clearances I would go with 25c's. that said, because of clearance issues, when I have worn out my 25c's I'm dropping back to 23c's...

 

[mcshroom]

Check your clearances (especially if you have guards), but I would go for 25s for a bit more comfort. 23s will be fine for a 95kg rider though. I've ridden on 23s quite a few times before including an audax round the Yorkshire Dales and I'm quite a bit heavier.

 

[MrWill]

Are the 25c tyres taller?

I'll be ok width wise, but there is a allen bolt inside the rear guard that is only 2.5mm from the 23c tyres at the moment.

I could increase it to 3 maybe 4 mm by using a different bolt.

Bike is a Ribble 7005 with guards.

 

[MrWill]

Ordered 25c anyway. Will see.

 

[MrGrumpy]

Depends on frame, If you have a rear guard assuming its not these crud guard type things then I reckon you will have room. My Langster will not take 25c with a crud guard fitted, will without though! The thorough bred race bike will take 25c but thats the limit or it will rub on the seat tube. 25c seems the way to go, more comfort and little rolling difference, of course if your weightweenie then all of this is a mute point as you would be running 20c tubs .


Oh and not all tyres are created equal, 25c Marathon + tyres are nothing like 25c Michelon Pros !

 

[Spoked Wheels]

Are the 25c tyres taller?

I'll be ok width wise, but there is a allen bolt inside the rear guard that is only 2.5mm from the 23c tyres at the moment.

I could increase it to 3 maybe 4 mm by using a different bolt.

Bike is a Ribble 7005 with guards.

Yes, they are taller. I just got away using a 25c by using 23mm rims.
I settled with 23c in the front and 25c at the back and with less pressure for more comfort.

 

[Nick Stone]

How do you find the 25 back 23 front, I did it the other day as a quick fix wheel change to save facing and get out, felt really good bit of comfort across the rough stuff on the bum and quick handling on the front.

I liked it but should I just move the other 25 to the front wheel.

Tyres are all GP4000s' and new so wear no problem....

 

[Spoked Wheels]

I like it and I got used to having them like that. You need to do whatever feels good for you.

 

[zacklaws]

I've just ridden 25C GP 4000S through the winter months and found them OK, comfort wise especially on broken tarmac and speed wise, apart for when you hit an head wind and then you feel that extra drag. Its because of that reason that they are not that popular in races, when it comes to a sprint and you hit a high speed, the drag factor kicks in as they do not slice through the air as clean as a 23 or less

Beware though that if you have the clearance, note how much, and if its marginal, then you have to think about it could be ride over if you get a slight buckle. On my Madone, its only marginal between the frame, front and back and also height wise too between the forks. I stopped dead one day climbing a steep hill, it was caused by a stone sticking to the outside of the tyre and jamming in the bridge of the fork, but with a 23, theres loads of clearance. Perhaps if I learnt to climb hills faster, centrifugal force would have kicked it off and prevented it happening.

 

[MrWill]

Beware though that if you have the clearance, note how much, and if its marginal, then you have to think about it could be ride over if you get a slight buckle. On my Madone, its only marginal between the frame, front and back and also height wise too between the forks. I stopped dead one day climbing a steep hill, it was caused by a stone sticking to the outside of the tyre and jamming in the bridge of the fork, but with a 23, theres loads of clearance. Perhaps if I learnt to climb hills faster, centrifugal force would have kicked it off and prevented it happening.

Good point. Will have a good look at this when they arrive.

 

[MrWill]

So the tyres have come and I've fit the rear one... There is 3 mm space at the most between tyre and mudguard. almost the same all around the guard.But 2mm at the bottom bracket part.
Bit too tight anyone reckon?
Possibly when I flex the wheel a bit it will rub? Can't really test them as I might need to send them back.