Magura Boltron eMTB suspension fork review

Burly (but heavy) 150mm travel trail tamer for the e-crowd

E-bike Gear
Magura Boltron Review

Stanchions are a beefy 40mm. Travel is 120mm or 150mm.

What is it

It’s a safe bet that when Magura first got into business back in 1893, they didn’t expect to be making burly suspension forks for electric mountain bikes. But flash forward to modern times and the German company was one of the first to bring an e-specific MTB bump tamer to market. The upside-down oriented Boltron was designed in collaboration with suspension gurus WP, who are best known for making OEM equipment for KTM and Husqvarna motocross bikes.

Magura Boltron Review

The Magura Boltron has no problem soaking up hits small and large.

Indeed, in the marketing video for the Boltron (which you can see below) one of the first selling points mentioned is how the increased mass and speed of modern eMTBs is closing the gap to motorcycles, which presumably is why you’d need a moto-looking fork on the front of your eMTB. And the Boltron certainly fits that bill. It’s upside down orientation and massive 40mm stanchions are designed to soak up the rough stuff — and deal the with the forces that come with trying to keep a 50-plus-pound mountain bike in control and on-line while charging through chunder.

Magura Boltron Review

Mtbr tested the Boltron on this $6999 Haibike XDURO AllMtn 8.0 eMTB.

The reversed design keeps constant lubrication on the fork sliders, helping improve sensitivity throughout the stroke, especially off the top. And the Boltron is compatible with 29er wheels and tires up to 2.4 wide, or 27.5 hoops with tires up to 3.0. Travel is 120mm or 150mm. Mtbr’s tester Haibike XDURO AllMtn 8.0 eMTB was set-up with plus tries and 150mm of travel. Other topline features include stock fork leg protectors and a burly 20x110mm axle. Press play for a full tech rundown, including a run through of the wheel removal process.

  • Super sensitive off the top
  • Magnetized axle tool included
  • Fork leg protectors come stock
  • Easy to read sag indicator lines
  • 22 clicks of rebound adjustment
  • Oversized stanchions improve stiffness
  • Beefy 20mm axle
  • Expensive
  • No external compression adjustment
  • Only available OEM for now
  • Wheel removal is tedious
  • Heavy at 2200 grams
  • Max travel is 150mm
Magura Boltron Review

Fork leg protectors keep stanchions safe and have handy sag indicator lines.

Mtbr’s Take

Clearly there’s a significant difference between a wispy 22-pound XC hardtail and the 51-pound Haibike XDURO AllMtn 8.0 eMTB that served as test mule for our review of the Magura Boltron suspension fork. Though they both share the same general mountain bike moniker, realistically the latter deserves its own categorization — and components. I wouldn’t dare charge into the gnar on this bike were it not for its burly alloy frame, powerful 4-piston brakes, and the Boltron, with its 40mm stanchions, 20mm thru axle, and 150mm of well-lubricated suspension.

Magura Boltron Review

Recommended air pressure ranges from 50-126 psi depending on body weight. There is no external compression adjustment.

And that’s the first important point about this fork: It just makes sense. The idea of spec’ing eMTBs with components originally made for sub-30-pound trail bikes doesn’t make sense. No wonder SRAM now makes an e-drivetrain, DT Swiss recently launched e-wheels, and Magura invested significant time and energy into the Boltron.

Magura Boltron Review

There are 22 clicks of rebound adjustment and the fork comes stock with a T25 torx tool to use for axle removal.

The result is an impressive, albeit heavy and expensive, bump tamer that’s good at its intended purpose. During several weeks of testing in the Crested Butte, Colorado, backcountry where many trails are multi-use and thus moto-legal, the Boltron dutifully handled numerous long, chunky descents. Its upside-down design means buttery smooth off the top sensitivity, while the oversized stanchions helped maintain stiffness and steering precision. This stiffness is magnified thanks to upper and lower floating bushings that overlap under compression to increase torsional and braking-force rigidity.

Magura Boltron Review

Here’s the T25 torx tool after removal from the axle.

Yes, it’d be nice if you could play with compression settings without pulling the thing apart. But with air pressure adjustment and a wide-range of rebound clicks, it was fairly easy to find the happy place. Setting sag was also straight forward thanks to indicator lines on the fork leg protectors.

Points are deducted, though, for the wheel removal process, which is time consuming and tedious (watch the video above to see what we mean). Thankfully Magura was wise enough to include the required T25 torx tool, which is housed inside the axle and held in place via magnetization.

Magura Boltron Review

The Boltron works with tires as wide as these 27.5×3.0 Schwalbe Nobby Nics. You can also run up to a 29×2.4.

Overall I can’t say I loved the ride experience, but that had more to do with the overall weight of the bike than the fork itself. I’ve never been one to shy away from climbing, so the call of the e-bike just isn’t that strong. And any way you slice it, blasting downhill on a lumbering 51-pound bike is not the same as the poppy, playful experience offered by the exceptional current crop of non-motorized trail bikes. But if riding eMTBs is your thing, then Mtbr strongly recommends looking at bikes with e-specific components such as the top-line performing Magura Boltron suspension fork.

Rating: 4 out of 5 4 Flamin' Chili Peppers
Price: 1190 euros (~$1389US)
More Info:

About the author: Jason Sumner

An avid cyclist, Jason Sumner has been writing about two-wheeled pursuits of all kinds since 1999. He’s covered the Olympics, Tour de France, MTB world champs, and dozens of other international cycling events. He also likes to throw himself into the fray, penning first-person accounts of cycling adventures all over the globe. Sumner has also done extensive gear testing and is the author of the cycling guide book "75 Classic Rides: Colorado." When not writing or riding, the native Coloradoan can be found enjoying life with his wife Lisa and kids Cora and Tommy in and around their home in the MTB Mecca of Crested Butte.

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  • bigcol says:

    This reads so much like the author is bitting his tongue. Just say it, you don’t like E-bikes and you wish you didn’t have to review motorbike stuff. We need people in the media to stand up for the sport of mountain biking! E-bikes are not mountain bikes. They don’t belong on this site or any MTB site.

  • John says:

    From reviews in the internet you’ll learn that the Boltron has a lot of flex, which really shouldn’t be surprising considering there isn’t an arch to connect the two legs. This fork also makes the use of a mudguard next to impossible… sure you can use the Topeak one but it will just look weird.

  • Scotch Henessey says:

    I ride a Pivot Mach 429 and a Haibike All Mountain 5.0 when with my 14 year old son. After 30 years of racing and riding non-electric assist bikes….the Haibike on a fun scale blows my Pivot out of the water. Hate all you want people…the E-bikes are here to stay.

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