Road Bike, Cycling Forums banner
1 - 20 of 29 Posts

·
Registered
Joined
·
26 Posts
Discussion Starter · #1 · (Edited)
help with 700x28c tires for roadbike

hi there, my first post here, i did use the search but i couldn't find any concrete answer.

i started this year cycling, bought a Merida Scultura 5000 with Ultegra components, love it, have already 2'4k km in 4 months, several 100km rides and getting ready for the first century.

as i will upgrade to a Specialized Tarmac D2i, i would like to convert the Merida to a cross bike, and i'd like to add 28c tires for the unpaved routers we have in Switzerland.

yesterday i tried Continental GP 4000S II 700x28c and they are about 1mm too big "rolling" on the fork.:mad2:

do you know any 700x28c tires that have a lower profile, not as tall, or maybe less round i could use for the gravel roads? The 25c (700x25c) are way to narrow and sinking in deep gravel

Many thanks for your advices
Dorin
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #3 ·
I did mention conversion to cross and that I want to use 28 tires right?!

I asked for help, if you cannot give an answer to my question then maybe is better to refrain yourself, at best your answer can be seen as useless
 

·
Registered
Joined
·
2,580 Posts
In my opinion, the best 28mm clincher road tire is the 25mm Continental Grand Prix 4 Seasons. It measures out to just under 28mm (depending on rim width), and is a great, long wearing, high thread count, all around tire.
 

·
Registered
Joined
·
21,638 Posts
I did mention conversion to cross and that I want to use 28 tires right?!

I asked for help, if you cannot give an answer to my question then maybe is better to refrain yourself, at best your answer can be seen as useless
His point is that if 28 mm tires are too big, then you need to use narrower tires. We understand the desire to use a 28 mm tire, but if it doesn't fit in your frame then the answer is to use narrower tires.

There is a lot of discussion about actual tire width vs. marketed tire width but there doesn't seem to be a single place you can go to get the "real" tire width. Of course this is compounded because of the different rim widths out there and so there are a lot of permutations and combinations.
 

·
Registered
Joined
·
8,798 Posts
I did mention conversion to cross and that I want to use 28 tires right?!

I asked for help, if you cannot give an answer to my question then maybe is better to refrain yourself, at best your answer can be seen as useless
He did answer your question, a 28mm tire that isn't 28mm's ceases to be a 28mm tire in anything but name only. If you find a 28mm tire that measures 26mm wouldn't that be, in the real world, a 26mm tire.
 

·
Registered
Joined
·
8,224 Posts
In my opinion, the best 28mm clincher road tire is the 25mm Continental Grand Prix 4 Seasons. It measures out to just under 28mm (depending on rim width), and is a great, long wearing, high thread count, all around tire.
My experience is that 4 seasons typically run narrow. I almost suggested a 28mm 4 seasons, but I have no experience with the 28mm GP4000SII to know if it runs similarly small.

To the OP, do not get hung up on tire sizes. You can only run what fits. You might find that your frame will not fit any 28mm tire and will have to find another frame/fork for your cross desire.
 

·
Registered
Joined
·
20,781 Posts
I did mention conversion to cross and that I want to use 28 tires right?!

I asked for help, if you cannot give an answer to my question then maybe is better to refrain yourself, at best your answer can be seen as useless
Putting 28mm tires on a bike designed for road racing doesn't "convert" it to a cross bike.


Continentals generally run oversize. Put a caliper on those 28's and they're probably around 29-30mm. 25mm continentals will be around 26-27mm. I agree with Migen, 25mm GP 4 seasons are a great all around tire.

do you know any 700x28c tires that have a lower profile, not as tall, or maybe less round i could use for the gravel roads? The 25c (700x25c) are way to narrow and sinking in deep gravel
If 25's are way too narrow, I don't think 28's are going to help much if the gravel is that deep.
 

·
'brifter' is f'ing stupid
Joined
·
15,565 Posts
I did mention conversion to cross and that I want to use 28 tires right?!

I asked for help, if you cannot give an answer to my question then maybe is better to refrain yourself, at best your answer can be seen as useless
What about my post is useless? Don't overreact because I gave an answer you didn't want to hear. As someone else posted if the tire doesn't measure 28mm it's not a 28 no matter what it says on the sidewalk. Turning a road bike into a cx bike never works...not enough room for tires.


Sent from my iPhone using Tapatalk
 

·
Registered
Joined
·
9,658 Posts
Challenge makes a nice 27mm tire and last I checked there were plenty of 27mm Paves still for sale. No idea if they are smaller than the 28mm you tried. If they fit just take a felt tip and change the 7 to an 8 and you'll have what you want. A tires that fits and says 28 on the side.
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #12 ·
Thanks for all the answers!

The Contnental 4000s II actually are 30.42mm wide when inflated, can anyone recommend a tire that will stay at 28 or max 29? Or is my only option to get a 26 which in turn will bloat to 28?

between 4-season and Michelin Pro4 endurance what would you recommend? I have Pro4 for 2,5000km and not one flat

cheers,
dorin
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #13 ·
Thanks for all the answers!

The Continental 4000s II 28c actually are 30.42mm wide when inflated, can anyone recommend a tire that will stay at 28 or max 29? Or is my only option to get a 26 which in turn will bloat to 28?

between 4-season and Michelin Pro4 endurance what would you recommend? I have Pro4 for 2,500km and not one flat

cheers,
dorin
 

·
Registered
Joined
·
536 Posts
I've been riding some Vittoria Rubino Pro with the Grafton. THey seem to be some of the smaller 28's out there. Mine were about 29ish on 25 wide rims so they may be true to size on a smaller rim. Rubino Pros do everything good and nothing great. Just a solid tire for me that rides nice and not expensive.
 

·
Registered
Joined
·
2,580 Posts
I've honestly never had a traditional puncture or pinch flat on my 25mm 4 seasons. the one exception was due to rolling over a metal strap in the bike lane that was kinda hidden in some shadows under an overpass. It sliced both tires to the rim. No pneumatic tire would have fared any better. I chalk that one up to rider stupidity.

Otherwise, the 4 seasons are very durable. I usually get about 4k miles of mixed light gravel and paved road/mut riding on a rear with the 25's.
 

·
'brifter' is f'ing stupid
Joined
·
15,565 Posts
Thanks for all the answers!

The Continental 4000s II 28c actually are 30.42mm wide when inflated, can anyone recommend a tire that will stay at 28 or max 29? Or is my only option to get a 26 which in turn will bloat to 28?

between 4-season and Michelin Pro4 endurance what would you recommend? I have Pro4 for 2,500km and not one flat

cheers,
dorin
Like many have said it depends on the tire/rim combination. Michelin tends to run very much over their stated size, I've had the 25mm Pro Race measure 28.0mm on Bontrager Race TLR rims which aren't hugely wide. They'd probably be close to 30.0 on HED Belgian +.


Sent from my iPhone using Tapatalk
 

·
Registered
Joined
·
363 Posts
On my 20 mm wide (internal) rims 25 mm GP4000s measure 27mm. 25mm Michelin Pro4 SC and Endurance measure even larger, close to 28 mm. That being said I don't know how good of a tire the GP4000 is for gravel riding, it doesn't really have any sidewall protection. I would probably want something with a little bit of tread if you are sinking into gravel.
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #18 ·
Sorry, didn't think that 28 become 30 or such, was presuming 28 is 28, I was surprised when I measured the GPs, hence my consternation. Cheers, Dorin
 

·
Premium Member
Joined
·
2,714 Posts
Well, you tried the Conti 4KS II in 28mm which blew up to 31mm and rubbed against the fork. Try the Challenge PR 27mm. It will inflate to 30mm but it wil be "shorter" than the Conti so it will easily clear the fork. It's got a file tread pattern and that's what you need for gravel.
 

·
Registered
Joined
·
26 Posts
Discussion Starter · #20 ·
Specialized Rouboix 700-25/28 expand to an exact 28mm wide and fit perfectly through the calipers :)
 
1 - 20 of 29 Posts
Top