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Pinarello takes frame asymmetry to extremes with £5,300 Grevil F gravel race bike

Sam Challis
1 Jun 2022

The updated Grevil F gets bigger tyre clearances, internal cables, adjusted handling and a very curious rear triangle

Pinarello has launched the Grevil F, an updated version of the aggressive gravel bike the brand first introduced in 2018.

Pinarello says the Grevil F is even racier than its predecessor, using tube profiles borrowed from the brand’s Dogma F race bike and internal cable routing to create a more drag efficient design that is 5 watts faster at 40kmh.

According to Pinarello the bike is 8% stiffer at the bottom bracket too, but blends this performance with practical touches like an increase in tyre clearance (space for 50mm 700c tyres), better handling thanks to adjusted geometry, and better comfort too.



All these changes are said to be underpinned by the Grevil F’s unique rear triangle which not only uses a dropped driveside chainstay, but a dropped driveside seatstay too.

Pinarello is introducing just one Grevil F build option to the UK in two different colours, and it's available now. The Grevil F costs £5,300 and uses Campagnolo’s Ekar groupset and Fulcrum’s Rapid Red wheels.

Fast made faster

For a brand with the race heritage of Pinarello, there was only one path it could ever take into the otherwise nebulous world of gravel. Its Grevil platform was released in 2018 and came in two variants, both setting out their stalls as unashamedly aggressive.

Essentially Dogma race bikes with bigger tyre clearances, they looked fast and rode fast too.

Maurizio Bellin, Pinarello’s chief operation officer, says Pinarello kicked off the competitive gravel segment.

While 3T and Gerard Vroomen, who released the aero-gravel Exploro bike in 2016, may have something to say about that, it isn’t unfair to say the Pinarello certainly added fuel to the fire of gravel’s competitive sub-genre.

Pinarello claims the new Grevil F builds on the raciness of that first iteration. The brand says a revised composite layup has created an 8% increase in stiffness at the bottom bracket junction.

The Grevil has apparently got more slippery too, to the tune of 4%. Features like a fork flap covering the front brake calliper, a concave down tube borrowed from the Dogma F that helps hide water bottles, and fully internal cable routing help it save 5 watts at 40kmh.

While Pinarello says weight loss wasn’t a priority in this revision and therefore wasn’t achieved, the Grevil F is still pretty light as gravel bikes go. A full build can start as low as 8.5kg in a size 53cm.

Performance and practicality

For all the claimed performance updates, Pinarello says it hasn’t ignored more practical needs in the Grevil’s update.

Pinarello says the Grevil F works with 700c and 650b wheels, working just as well with 28mm 700c slicks on road as it does with 53mm 650b gravel tyres on the dirt.

A steeper seat tube angle and dropped driveside chainstay pushes 700c tyre clearance out to 50mm from 42mm.

Changes to the handling geometry are said have increased stability and there has been more flex built into the shape of the seatpost as well, in an attempt to introduce more comfort.

The headtube is slacker, but the rake on the Grevil F’s Onda fork has been increased to preserve a long trail figure, and therefore stable ride characteristics. Bellin says the Onda’s distinctive wave-shaped fork legs coupled with this new rake figure increases the damping effect through the fork.

‘The frame’s shorter reach and higher stack allows riders to adopt a position better suited to absorbing impact too,’ says Bellin.

Unique rear end

Bellin says that all the changes made to the Grevil F are underpinned by Pinarello’s TwinArm concept, used in the frame’s rear triangle.

Pinarello says it designs bikes around the understanding that a bicycle frameset is subject to asymmetrical forces, courtesy of the drivetrain being on the right side of the bike.

It is fairly common for brands to make concessions for this: a downtube might change shape in certain areas close to the bottom bracket junction, or one chainstay may be a different shape to the other, yet that is generally the extent of the modification.

Pinarello takes the concept further though. Its bikes are dramatically asymmetrical and the Grevil F is probably its most extreme design to date.

‘The driveside chainstay has been moved downwards to free up space in a particularly congested area between the rear tyre and chainset,’ says Bellin.

The dropped chainstay (a feature pioneered by Gerard Vroomen, incidentally) is now a common sight on gravel bikes, but the Grevil F is unique in that its driveside seatstay has also been dropped too.

‘In effect we have rotated the entire driveside rear triangle downward,’ says Bellin. ‘That means that despite the different orientations, both rear triangle pairings have a similar geometries and consequently they respond symmetrically to stress.

‘Having the seatstays connect to the seat tube at different points also helps to disperse energy received through the rear axle more effectively.’

Limited options

In the previous generation Grevil, the ‘+’ variant used the uber-premium Toray T1100 Dream Carbon composite Pinarello has its Dogma F road bikes fabricated with. The new Grevil F is made with a blend using the comparatively modest T700 composite.

‘T700 promotes impact strength, making the Grevil F more robust,’ says Bellin.

Build options in the UK for the new bike are similarly sparse. There is just one, based around Campagnolo’s Ekar groupset and Fulcrum’s Rapid Red wheels that is available in two colour options.

The new Pinarello Grevil F is available to buy for £5,300 now from pinarellostore.co.uk

Image credit: Roberto Bragotto