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MMR X-Bolt 120
MMR

X-Bolt 120 2024

CurrentDown-Country eMTBAgeing · 4.1/10iFreshness 4.1/10
How current the bike is — newer chassis, motor and battery score higher. 10 = brand-new, 0 = legacy.

G2 carbon 120mm 29er trail e-bike on Bosch Gen 4

Travel F/R
120/120mm
Wheels
29F/29R
Frame
Full carbon
Price
From £2,549
View the MMR X-Bolt 120 on MMR’s site
MMR X-Bolt 120 2024
From £2,549
EMTB Forums verdict

The MMR X-Bolt 120 2025 is a short-travel carbon downcountry eMTB built around the Bosch Performance Line CX Gen 5 motor, sitting in the rare 130/120 mm trail-leaning segment. Headline numbers: 120 Nm of torque, 750 Wh battery, 130 mm front / 120 mm rear travel, a 67.0 degree head angle, three sizes (S, M, L) and a Bosch-powered full-power drivetrain in an unusually short-travel chassis. There are no curated community quotes on file yet, so this verdict draws on the gold spec sheet and Bosch CX Gen 5 platform context.

Drive system and range. The Bosch Performance Line CX Gen 5 is the latest iteration of Bosch's full-power line, delivering 120 Nm of torque and a 750 W manufacturer-claimed peak after the post-PU2.0 firmware update unlocked the eMTB+ mode with around 400% rider support. The motor is lighter than the Gen 4 predecessor at 2.8 kg with a magnesium casing, and Bosch has resolved the long-running gearbox clacking issue. Pairing this powerful 120 Nm full-power unit with a 130/120 mm short-travel chassis is an unusual choice — the X-Bolt is effectively a "power-XC" rather than a trail-class bike. The 750 Wh battery is large for the chassis weight, so range will be generous in mid-tier assist modes for cross-country and undulating-trail rides.

Geometry and handling. The X-Bolt comes in three sizes (S, M, L) with reach progressing from 435 mm (S) through 460 mm (M) to 484 mm (L). The head angle is fixed at 67.0 degrees across the range, which is firmly cross-country territory — significantly steeper than even modern downcountry rivals at 65 to 66 degrees. The 457 mm chainstay is long for a downcountry bike, biasing the platform towards stability over agility, and wheelbase grows from 1,183 mm (S) to 1,245 mm (L). This is a bike geared towards efficient climbing and stable, fast cross-country riding rather than steep technical descending.

Build and value. Only the base trim is on file. With the carbon frame, Bosch CX Gen 5 motor and 750 Wh battery, the X-Bolt 120 occupies a niche that few other major brands cover — full Bosch power in a downcountry travel format. Pricing is not listed in the gold facts. The trade-off is that buyers in this segment often prefer lightweight motor systems (Bosch SX, TQ HPR50, DJI Avinox M1) over full-power; the X-Bolt's combination of full-power motor and short-travel chassis is a deliberate niche play.

Verdict. The MMR X-Bolt 120 2025 suits the rider who wants the climbing power of a Bosch CX Gen 5 full-power motor and the range of a 750 Wh battery, but in a short-travel, XC-style chassis with conservative 67 degree geometry — cross-country racing, long-mileage trail tours, and rolling singletrack are the natural home. Less suitable for descending-focused riders, who should look at slacker, longer-travel platforms with the same Bosch CX Gen 5 motor (Bergamont E-Contrail Pro, Trek Powerfly FS). Production status: current. Without community feedback or pricing on file, demo and dealer engagement essential.

Geometry · hover a row to highlight the measurement on the bike

Bike geometry diagram
SML
Toptube584 mm603 mm626 mm
Reach435 mm459 mm484 mm
Stack609 mm622 mm636 mm
Seattube406 mm457 mm508 mm
Chainstay457 mm457 mm457 mm
Headtube Angle67°67°67°
Seattube Angle (eff)76°76°76°
BB Drop37 mm37 mm37 mm
Wheelbase1183 mm1214 mm1245 mm
Headtube110 mm125 mm140 mm
Front Centre726 mm757 mm788 mm

Trims · 5

X-Bolt 120 30 Carbon
£2,549
00
£3,079
X-Bolt 120 10 Carbon
£3,099
10
30
MotorBosch Performance Line CX Gen 5 · 120 Nm · all trims
Battery750 Wh · all trims
Travel F/R120/120 mm · all trims
FrameCarbon · all trims
ForkRockShox 35 Silver Air Crown 15 Boost E-bike, 120mm, TaperedFox Factory 34 E-Bike, 120mm, TaperedFox Performance 34 E-Bike, 120mm, TaperedFox Performance 34 E-Bike 120mmRockShox 35 Silver Air Crown E-bike 120mm
ShockRockShox Deluxe Select R 120 E-bikeFox Float DPS Factory 120 E-bikeFox Float DPS Factory 120 E-bikeFox Float DPS Factory 120 E-bikeRockShox Deluxe Select R 120 E-bike
HeadsetRitchey Pro Integrada Tapered 1.5 · all trims
StemRace Face Ride 35 · all trims
HandlebarRace Face Ride 35, 760mm, 10mm Rise · all trims
SaddleSan Marco GND Dynamic · all trims
SeatpostRace Face Aeffect R Dropper 125mm 30.9Fox Transfer Factory Dropper 125mm 30.9Race Face Aeffect R Dropper 125mm 30.9Race Face Aeffect R Dropper 125mm 30.9Race Face Aeffect R Dropper 125mm 30.9
BrakesSRAM SX Eagle 12-speedSRAM DB8 CL 200/180SRAM DB8 CL 200/180SRAM DB8 CL 200/180SRAM SX Eagle 12v
Rear derailleurSRAM SX Eagle 12-speedShimano XT M8100 12-speedSRAM GX Eagle 12-speedSRAM GX Eagle 12-speedSRAM SX Eagle 12-speed
CrankFSA Forged E-bike 34FSA KFX E-bike 34FSA Forged E-bike 34FSA Forged E-bike 34FSA Forged E-bike 34
ShiftersSRAM GX Eagle 12-speedShimano XT M8100 12-speedSRAM GX Eagle 12-speedSRAM GX Eagle 12-speedSRAM GX Eagle 12-speed
CassetteSRAM SX PG-1210 Eagle 12-speed 11-50TShimano Deore M6100 12-speed 10-51TSRAM GX Eagle XG-1275 12-speed 10-52TSRAM GX Eagle XG-1275 12-speed 10-52TSRAM SX PG-1210 Eagle 12-speed 11-50T
ChainSRAM SX Eagle 12-speedShimano Deore M6100 12-speedSRAM SX Eagle 12-speedSRAM SX Eagle 12-speedSRAM SX Eagle 12-speed
DrivetrainSRAM SX Eagle 12-speed; FSA Forged E-bike 34; SRAM GX Eagle 12-speed; SRAM SX PG-1210 Eagle 12-speed 11-50T; SRAM SX Eagle 12-speedShimano XT M8100 12-speedSRAM GX Eagle 12-speed; FSA Forged E-bike 34; SRAM GX Eagle 12-speed; SRAM GX Eagle XG-1275 12-speed 10-52T; SRAM SX Eagle 12-speedSRAM GX Eagle 12-speedSRAM SX Eagle 12-speed
WheelsMavic E-DEEMAX 29 30 CLDT Swiss H-1900 35 Hybrid MS TLRMavic E-DEEMAX 29 35 CLMavic E-DEEMAX 29 35 CLMavic E-DEEMAX 29 30 CL
TyresHutchinson Griffus TLR Sideskin 29x2.50 · all trims
Price£2,549£3,079£3,099

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