Is the UCI’s 6.8kg bike weight limit an outdated rule in need of reform, or an important safety measure?

Introduced in 2000 to prevent manufacturers from pushing the limits with carbon-fibre, a material of which they still did not have a complete knowledge, to the point of failure, all bikes used in race must be at least 6.8kg.

However, 16 years later, and technology, if not the UCI rules, have come a long way.

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Learning from the aerospace and automotive industries, bike manufacturers now have a mature understanding of carbon-fibre, and the ability to alter things like the alignment of the individual fibres and the thickness of the material to create bikes that are not only light and safe, but great to ride.

“Additional years of carbon-fibre composite use and additional research has led to the development of new materials and manufacturing technologies”, says Cannondale’s James LaLonde.

“We are now able to concentrate material exactly where it’s needed to maximise stiffness, optimise strength and shave unnecessary weight, and test to know it’s safe.”

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That means that for a number of years now you’ve been able to walk into a bike shop and, if your wallet is full enough, buy a bike that was far too light to be used by the pros, yet still perfectly safe.

The long road to reform

Peloton on stage two of the 2016 Tour of California

The UCI’s rules aren’t keeping pace with technology

Professional sportsmen and women should have access to the best equipment, so it is a surprise that it has only been in the last few months that the UCI has instigated a review of the 6.8kg limit.

That process starts with the World Federation of the Sporting Goods Industry (WFSGI) which has been charged by the UCI to talk to cycling manufacturers to present an alternative to the outdated rule. The man at the centre of this process is Yves Möri, the WFSGI’s Bicycle Manager.

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“There are a lot of different views in the industry”, says Möri. “Some say we should remove it because it limits innovation, but others say that if you get rid of the weight limit altogether then you could end up with a ‘war of weight’ in the industry as everyone tries to create the bicycle with the lowest weight, meaning that you won’t get much innovation elsewhere, such as with aerodynamics, disc brakes, power meters, etc.”

It’s a nascent process so Möri cannot say which solution the WFSGI will present to the UCI, but there are clearly a number of different paths to be explored.

The solutions

A commissaire weighs a bike at the Vuelta a Espana (Photo: Watson)

A commissaire weighs a bike at the 2015 Vuelta a España. Photo: Graham Watson

The first is to simply do away with a limit altogether. After all, as pointed out by LaLonde, even without the rule bikes should still be safe: “The UCI rules already make riders responsible for their bike’s safety, and also say that they must pass international strength and fatigue tests. So race bikes are already reasonably safe, weight limit rule or not.”

However Möri is not completely convinced, saying that further study is needed to see if international tests can guarantee safety in road racing. After all, how do you test for a 70kph mass pile-up at the end of a Tour de France stage?

One other possible solution is to add a safety test to the UCI’s current frame approval process, through which all frames used in the peloton have to pass.

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This could guarantee safe frames, but might also stifle innovation in other areas (such as wheels, power meters, cameras, and electronic shifting), all of which have come on leaps and bounds under the 6.8kg rule as makers of these goods have been able to test their products in the pro ranks without needing to trim weight.

Whatever the solution, the 6.8kg rule is going to remain in the regulations for a little while yet.

“This is a long-term project”, says Möri. “Just because we present the proposal to the UCI in a year does not mean that it will be implemented in a year and a day. There must be a certain delay to allow the industry to react to the rule change.”

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Our take

A reform of the 6.8kg limit is well overdue, but after the recent halting of its disc brake trial the UCI isn’t going to rush into a decision. That means it’s unlikely the limit will be removed altogether, and safety left solely to the manufacturers. Instead it seems there needs to be a testing process of sorts to ensure lightweight frames are strong enough to deal with the eventualities of pro racing.


How much difference does your bike’s weight really make?


Should the UCI weight limit be scrapped?

Yes: James LaLonde, global marketing manager, Cannondale

“Life is full of risks. Neither the 6.8kg rule nor international standards can guarantee safety. There are already bikes on the market, completely safe for consumer use, that come in between 4.4kg and 4.6kg, and engineers have built bikes as low as 2.8kg and logged thousands of kilometres on them.”

No: Terry Dolan, founder of Dolan Bikes

“There is some credence to the weight rule, but not at 6.8kg. This is an outdated figure and 6kg would be low enough. However I don’t think weight should be the focus. The lighter the bike is the more difficult it becomes to handle, especially on long bumpy descents.”

  • Bob

    For the majority, I would have thought that the structural integrity would be self regulating, ie if it ‘collapses’ under load they aint going to sell many are they? you cant hold back progression by using some dated rule that isn’t relevant, and new techniques and materials always filter down anyway to the benefit of all.

  • Stephen J Schilling

    I suspect the industry isn’t really pushing as hard for this rule to change as soon as possible because they know it will be detrimental to their sales pitches for electronic group sets and disc brakes, in that both are heavier, as a system, than their counterparts.

  • harry

    I believe the weight limit is in place because of concerns about the structural integrity of the bike, maybe it’d be an idea for the teams to submit a bike or 2 for some kind of crash test?

  • anon

    The only bike that ever broke under my feet was quite a bit above 6.8 kg… How does weight itself assure safety and stability?

  • Andrew Jones

    Having a weight limit helps level the competition a little, the lighter a bike is the more expensive it inevitably will be to develop and manufacture, a minimum weight negates the advantage of this. I’m sure Sky would be happy to put Chris Froome on a $100,000 frame if they thought it would save a kilo going up a mountain, that then starts an expensive R&D battle similar to that which has plagued Formula 1 motor racing.

  • llos25

    The weight of the rider surely is as important with such a difference in body weights the bike is only a fraction of the total.

  • TrevorHoldsworth

    Bit of a joke weighing a TT bike with a disk wheel. I saw somewhere recently that Tom Dumoulin’s TT bike for le Giro stage 1 weighed in at 9.030 kg.