Technology invested in carbon clincher rims may be deciding factor in the great tyre debate. Stuart Clapp investigates

Local bike shops used to be dimly lit with dusty shelves and photos of past champions lining the walls. There was always a hum of rubber from the tyres stacked in bundles that hit you as soon as you walked through the door. Back then, choosing tyres was simple: tubular for racing, clinchers for everything else, but that theory became complex with the introduction of full carbon clinchers.

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Clinchers are cheaper, they’re easier to use, and as a result, they’re by far the most popular tyre system. This popularity means there’s more development going into them, and with that, the threads per inch (TPI) count has increased.

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The higher the TPI, the lighter and faster the tyre will be. Good news. The performance benefits are now narrower than ever.

It’s as much down to an improvement in wheels as it is tyres. Previously clinchers were exclusive to heavy hoops, with a band of alloy braking surface painted around the rim that increased weight and hampered acceleration.

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With consumers dictating their needs to manufacturers, like we’ve seen with the trend for longer head tubes on frames, will carbon clinchers find their way to the professionals?

“Tubulars will be the go-to [wheel] for professional road racers in the peloton,” says Jason Fowler, product manager at Zipp. “The wheels are lighter and if you have a puncture, you can generally continue riding the flat until the team car is behind you with a new wheel.”

That’s fair reasoning, but at some point clincher equipment (tyres and wheels) will catch up.

Schwalbe One 30mm Tubulars

Schwalbe One 30mm Tubulars: still popular at this year’s Paris-Roubaix

Clincher advancements

“With recent advancements in clincher technology — as well as not as much focus on weight — we could see more clincher tyres being used in time trials,” adds Fowler. “For example, Tony Martin rode the Super-9 Carbon Clincher disc to many victories over the past two years.”

The trend for wider tyres has also added to this. A clincher, given a bit of extra breadth, can be run at lower pressures, adding comfort and traction without it being detrimental to speed. Sound familiar? This is the sort of thing usually attributed to tubs.

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While we ponder that, it’s worth thinking about the third party. With the introduction of more tubeless compatible rims to the market, cyclists have a fully justified third option: tubeless.

Wheel brands are starting to warm to the idea of tubeless tyre systems as Dave Taylor, marketing manager for Schwalbe UK says. “There’s now plenty of choice for tubeless road tyres and tubeless, or two-way fit, road wheels. We’re even starting to see bike manufacturers spec two-way fit rims
on new bikes.”

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The new Focus Izalco Max comes with a set of Schwalbe One tubeless tyres as standard. Just like tubulars, tubeless tyres don’t require an inner tube. It means that rolling resistance is low and there’s no risk of pinch flats, again similar to tubs. If a tubeless tyre punctures, the hole can be filled with sealant quicker than it takes to find a set of tyre levers, and they’ve even found their place in the pro peloton. IAM rode them this year at the Santos Tour Down Under.

Our take

The demand for clinchers is far greater than our desire for tubs, and wheel manufacturers are well aware of it. Full carbon clinchers, which boast similar attributes to tubular wheels, are as fast as they are practical. They have the potential to put a thorn in the side of tubular tyres for good, but not quite yet. It’s early days for tubeless road tyres, but it’s an idea likely to gain even more momentum.

JLT-Condor-kit

JLT-Condor presented by Mavic

Yes: John Herety, Manager JLT-Condor presented by Mavic UCI Conti cycling team

“Pro riders will always favour tubs on account of their superior feel, lighter wheels and the psychological boost that comes from riding something special on race day. JLT-Condor train and often race on clinchers, only swapping out to tubs for targeted races, owing to the potential cost and man hours involved in fixing punctures .”

Zipp 25mm

Zipp tyres

No: Mark Cantella, SRAM/ Zipp Aftermarket product manager (including tyres)

“Zipp is committed to clincher development due to the positive performance characteristics we have seen with our current clinchers. Clincher development will continue with attention to rolling resistance, grip and ride compliance, while tubular offerings will remain in the Zipp tyre range for the foreseeable future.”

This article first appeared in the April 2 issue of Cycling Weekly

  • rshimizu12

    I prefer tubulars for longer rides. They are more comfortable and are better able to handle bad a road conditions like gravel.

  • Nick Dorsett

    Carbon doesn’t dissipate heat well, therefore carbon clinchers are more prone to the tire catastrophically blowing off of the rim. I wouldn’t ride carbon clinchers for this reason alone. In the pro pelaton with wheel changes possible there is no reason to rode clinchers. Additionally, a tubular is easier to change on the road if you flat provided you know what you are doing. I’d rather ride tubs than clinchers any day.

  • Scott Taylor

    This question has reared it’s head periodically for at least 20 years, with exactly the same opinions and results. By and large, it’s tubulars for racing and clinchers for everything else. The fact that Tony Martin has been mentioned so often for using a clincher rear for TTs says it all. I seem to remember that much was made of Indurain apparently using clinchers when there was a lot of descending as the tubular glue softened because of brake heat. I think most pros would rather descend at 80kph on a tub

  • Richard Durishin

    Oh. No worries. Until they’ve held them both in their hands, most people don’t get the difference.

  • Richard Durishin

    Oh. No worries. Until they’ve held them both in their hands, most people don’t get the difference.

  • FT Davidsson

    I was ignorant to that fact. Interesting. Thanks sir.

  • Richard Durishin

    Clinchers need more material than do tubulars. Brake track or not.

  • FT Davidsson

    Without the need for a brake track on the rim that more material would disappear though

  • Richard Durishin

    Well, no, it won’t be because clinchers must have more material in the rim than tubular rims. So they will continue to be slower to accelerate and change direction than disc tubulars. Racers will always want whatever takes less energy to move so disc tubulars will be the thing to have.

  • FT Davidsson

    the optimal set up would be a high tpi count tubeless tire on a disc wheel. I’d think that set up would be the end of tubulars

  • Richard Durishin

    But the move to disc brakes and their advantage of allowing even lower rotating mass than a current tubular wheel argue for tubs to continue to be used.