Product Launch
The A.150M: Our Hard-Hitting Trail & Enduro Benchmark, Now With Mixed Wheels
13 November 2025
The A.150 has long been our benchmark for enduro and hard-hitting trail riders. A bike shaped by years of iteration, testing, and racing on some of the toughest terrain in the world. A bike that climbs well, descends hard, and holds its own up and down every trail on the hill.
Now, it’s joined by a new member of the family: the A.150.M.
What’s the M for?
Mixed wheel. MX. Mullet. Whatever you call it, the A.150M runs a 29-inch front wheel and a 27.5-inch rear. The result is a shorter rear centre and tighter wheelbase that boost agility and add more rider-to-tyre clearance when things get steep, while keeping the A.150’s trademark balance and composure.
It’s the same ultra-refined carbon and titanium construction, but the geometry tweaks and smaller rear wheel dial up the responsiveness and a straight-through seat tube offers deeper dropper post insertion.
Watch Dan shred some Dyfi backcountry aboard the A.150M
Proven DNA
Just like its full-29er sibling, the A.150M is designed to take on everything from big-mountain missions to quick lunch laps, to enduro race stages.
The A.150M carries forward the balanced geometry that has made the A.150 a rider favourite. A slightly slacker 64.5° head angle boosts confidence and control at speed, while steep seat tube angles between 77.5° and 79° keep riders centred over the pedals on the climbs. Chainstays are 3 mm shorter across the size range. With 22 size options and precise reach and stack steps, every rider can find their perfect fit. No compromises, no “close enough” setups.
“Both A.150 and A.150.M are perfect all-rounders. We see this range extension as part of our drive for perfect-fit, not only in frame sizing, but in matching rider preferences and terrain. Both variants are capable and versatile, and they track the ground like they’re glued to it.”
Dan Brown, CEO, Atherton Bikes
Build options
Just like its full-29er sibling, the A.150M is designed to take on everything from big-mountain missions to quick lunch laps, to enduro race stages.
The A.150M carries forward the balanced geometry that has made the A.150 a rider favourite. A slightly slacker 64.5° head angle boosts confidence and control at speed, while steep seat tube angles between 77.5° and 79° keep riders centred over the pedals on the climbs. Chainstays are 3 mm shorter across the size range. With 22 size options and precise reach and stack steps, every rider can find their perfect fit. No compromises, no “close enough” setups.
Custom Builds? Always
Like all A-Range bikes, we’ll happily dial it in your way. Want something weird? Something wild? Reach out to our team in Machynlleth, we’ll help you build it your way.
Get to know the A.150 & A.150M: Rachel talks through the range
S-Range Enduro: The S.150
Want to explore what else is in our hard-hitting trail and enduro stable? Check out the 7075 aluminium S.150. We like it a lot, and so do the crew at Enduro Mag who awarded it 'Best Buy' in their 2025 Trail Bike Test.