Museeuw flax bike launch

Cobble-eating machines from the Leeuw van Vlaanderen

When professionals retire – particularly the very successful – it’s not uncommon for them to open their own factory and produce a range of bikes.


For a legend like Johan Museeuw, any frame to bear his name would have to be something a bit out of the ordinary.  And they are. The frames that the Leeuw van Vlaanderen has produced are refreshingly unique and herald the use of a material never before seen in bicycle production: flax.

Flax/carbon: a revolutionary material

The three frames in the Museeuw range are made from a flax/carbon hybrid.  Yes, you heard correctly, we said flax, the natural fibre that is used to make linen, ropes and other textile products.  The Belgians are no strangers to the use of flax fibres, but their country’s production is historically geared towards the traditional linen and lace making industries.  Now they’re blending the plants’ fibres with carbon to produce frame tubes that, it’s claimed, display characteristics like no other material.

Carbon fibre tubes are already highly tunable in their ride characteristics by altering the lay-up, number of plies, fibre content and tube shapes.   The beauty of flax, claims Museeuw, is that the material’s fibres themselves are what absorb the vibration.  This allows for the production of frames that are built purely for stiffness with no need to specifically build in damping as in other frames.

The tubes themselves are formed by IPA Composites of Belgium and then shipped to Italy for assembly by renowned framebuilders Billato – who have been producing frames for themselves and under other brands names since 1954 – using a unique flax/carbon wrapping system.  The completed frames are then returned to the Museeuw factory in Belgium for the final paint scheme to be applied.

Billato produces three road frames for the Museeuw range: the top-of-the-line MF1 elite racing frame uses a 50/50 carbon/flax mix of fibres in the main tubes while the MF3, the team bike of the Museeuw-sponsored Swift Racing women’s squad, uses a firmer-riding 65/35 carbon/flax blend.  The MF3 is also available in cyclo-cross and track versions – the Pista with less (20%) flax for more stiffness, the Cross with slightly more (40-50%).  The newest MF5 contains an incredible 80% flax fibre.

All frames are equipped with an MF9 fork which is made from a similar 50/50 mix to the MF1 frame.

Riding Vlaanderen with the Leeuw

We took in some of the most famous roads from the Ronde for our test rides in the company of one of its most legendary champions, Johan Museeuw, as well as Swift Racing’s Emma Davies. It was on Davies’ local roads around Oudenaarde that we were to put the flax/carbon frames through their paces.

Our hero (in third wheel) ‘escorts’ museeuw up the cobbles of the oude kwaremont.: our hero (in third wheel) ‘escorts’ museeuw up the cobbles of the oude kwaremont.
Henry Iddon/

MF1 – built for de Kasseien

For the morning ride, we set out on a Shimano Ultegra-equipped MF1.  On the flat asphalt roads and long gentle drags that made up the early kilometres on the way out of Oudenaarde – in the direction of the business end of Flanders – the frame proved to be exceptionally stiff as promised.  Trying to keep our heads clear of the company’s expected eulogising over the frame’s qualities, we couldn’t help wondering how a frame that was this stiff would fare when we reached the kasseien (cobbles) that are such a feature of this region.

The first of the kasseien that we were to tackle was the Molenberg – one of the early climbs in the Ronde itself.  The speed at which we rode the maximum 14.2 percent cobbled gradient made it difficult to judge the vibration damping, but it did allow us to notice once again how stiff the frame is – neither end showed much sign of flex.  

It also gave us a lesson in humility: as we were climbing the berg – being dropped by most but still doing well by our own modest standards – a sudden blur to our left heralded the flying figure of Museeuw himself, having hung back at the bottom, riding as though we were on a flat section of cobbles rather than one of the steepest in the area.  If nothing else, it brought home the fact that Johan Museeuw was born to ride these roads.

Not long after we crested the Molenberg, Davies led us to one of the long flat stretches of cobbles that punctuate most of the races in the area.  To our surprise, it seemed that what the marketing material had told us was actually true: we’d ridden these roads on a great deal of different bikes, in materials ranging from super-stiff and unforgiving 7000-series aluminium to virtual soft tail frames, but this was something different entirely.  At no point was there the sensation that the frame was flexing at all, in any direction, but the sting of these legendary Flemish stones was definitely being softened by something within the frame’s tubes.

This comfort sensation was further experienced later on when Davies’ route led us to the village of Kwaremont, and down (yes, down!) the famous Oude Kwaremont climb.  The vibration eating frame and fork once again conspired to keep the bike steady and take the worst out of the hits and bumps. A few kilometres further on from the Oude Kwaremont, we took that famous right turn and were presented with the awesomely frightening sight of the Koppenberg stretching before us.  This famous old climb is now back in the Ronde after a one year hiatus – and after originally being left out due to worries about its surface – and we’ve had a love/hate relationship with it over the past few years.  Once again though, the stiffness and damping combination of the MF1 came to our aid and we managed a personal best on the precipitous cobbled surface – in a 39x23T!

MF5 – comfort further defined

Flax fibres make up most of the main tubes on the mf5.: flax fibres make up most of the main tubes on the mf5.
Henry Iddon/

After a hearty Flemish lunch in the Centrum’s Brasserie de Flandrien, while everyone else was being treated to a visit to the museum and shop, we snuck off alone to try out the new 80 percent flax MF5 frame.  The higher concentration of flax fibres in the MF5’s main tubes are designed to be even more compliant without making too many compromises on the frame’s stiffness.

Despite not feeling like quite as much of a pure racing frame as the MF1, the MF5 still proved to be appropriately rigid as we pounded along Oudenaarde’s concrete cycle paths in search of something a bit more challenging.  On the way out of town is a hill, the Kattenberg – not often climbed in races, in fact the Ronde usually descends it straight after the Wolvenberg – which is surfaced with small cobblestones, about three inches square.  These stones are not as bumpy as the sort that we’d been riding this morning, but the frame almost managed to make it feel like the road was asphalted.  Repeated climbing and descending of the Katteberg on the MF5 allowed us to explore its stiffness on the way up and its shock absorbing qualities on the way down.  Without a doubt this was one of the most forgiving rides we’d had in quite a while.


Look out for a full test of a Museeuw frame on BikeRadar in the coming weeks.