Rock Machine eBlizz 90 S
A 29-inch aluminium hardtail e-MTB with Shimano EP600 assistance, a 504 Wh battery, 130 mm air fork and dropper, for value-conscious trail and leisure riders.
- Shimano EP600, 85 Nm: Mid-drive torque for steep climbs and slow, technical trail
- 504 Wh Darfon battery: Integrated, removable pack you can take indoors to charge
- RockShox Judy Silver TK, 130 mm: Air-sprung fork you can set to your weight
- 30.9 mm dropper post: Drop the saddle for descents and technical sections
- Shimano CUES 1x10, 11-48T: Wide range from steep pitches to faster fire roads
- Shimano MT200, 180 mm rotors: Hydraulic braking for the extra speed assistance brings
Rock Machine eBlizz 90 S Deals
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Bikesy's Verdict
The Rock Machine eBlizz 90 S is worth comparing if you want a 29-inch hardtail e-MTB with Shimano EP600 torque, a 130 mm Judy air fork and a dropper, without rear suspension or pannier mounts. Match offers to the EP600, 504 Wh Darfon, Judy Silver TK and CUES 1x10 build. Height bands for M, L and XL overlap, so a test ride is the sensible way to choose a size.
Pros
- Shimano EP600 motor with 85 Nm of assistance
- 130 mm RockShox Judy Silver TK air fork and a dropper post
- Shimano CUES 1x10 with an 11-48T cassette
- Removable 504 Wh Darfon battery
Cons
- Hardtail frame, so very rough ground comes through the saddle
- Around 24 kg, which makes lifting onto hooks, stairs or some racks awkward
- 504 Wh battery; range headlines are maxima, not a typical-day figure
The Rock Machine eBlizz 90 S is a 29-inch aluminium hardtail e-MTB for trail riding and mixed off-road use. It suits a value-conscious rider who wants high-torque assistance, a 130 mm air fork and a dropper, rather than a utility commuter or a full-suspension bike. If that is you, it is worth comparing current UK offers.
A UK offer belongs here when it has the Shimano EP600 motor, 504 Wh Darfon battery, RockShox Judy Silver TK fork and Shimano CUES 1x10 drivetrain. The eBlizz B90 and B90T are separate models.
Motor, battery and range
The motor is a Shimano STEPS DU-EP600, rated at 85 Nm, 250 W and 36 V. Assistance stops at 15.5 mph, so beyond that you are on your own legs. The 85 Nm is what helps on a steep climb or when you want to keep moving through a slow, technical bit of trail.
The Darfon battery is integrated and removable, 504 Wh at 36 V. Rock Machine claims a maximum of up to 120 km. Halfords quotes a 60-mile maximum under optimal conditions. Both are best-case figures, not a typical-day promise. What you actually get varies with terrain, assistance level, load, temperature, tyres and wind, and 504 Wh is a compact battery for this much motor.
Trail equipment
It is a 6061-T6 aluminium hardtail with Trail Ultimate geometry, 29-inch wheels and Rubena Cheetah 29x2.35-inch tyres. The RockShox Judy Silver TK Solo Air fork has 130 mm of travel, a tapered steerer and a 15x110 mm axle. You can set the air spring to your weight, which matters once you start hitting roots and braking bumps.
A 30.9 mm dropper lets you get the saddle out of the way when the trail points down. The manufacturer describes 150 or 170 mm of travel depending on size, while retailer spec lists 170 mm, so confirm it on the frame you buy. Shimano CUES 1x10 with an 11-48T cassette covers steep climbs and faster tracks with one shifter. The EP600 system is described as Auto Shift compatible, but the fitted CUES drivetrain is manual. Shimano MT200 hydraulic discs with 180 mm rotors front and rear do the stopping.
With no rear shock, rough ground comes through the saddle, and you have less comfort and control than on a full-suspension e-MTB.
Commuting and carrying
Mudguard mounts are present, so you can add compatible frame-mounted guards for wet rides. Mudguards are not fitted, and there are no pannier mounts or a built-in kickstand. Assistance is limited to 15.5 mph, and the UK retailer states a 120 kg maximum rider weight.
Charging, weight and warranty
The battery comes out of the frame and charges with a Darfon 4A Smart Plus charger. Halfords quotes up to eight hours. Claimed weight is 23.35 kg, or approximately 24 kg in UK retail data, so lifting it onto storage hooks, stairs or some vehicle racks may be difficult.
The five-year frame warranty needs annual inspections at an authorised dealer. Without those, it is two years.
Geometry
eBlizz 90 S, standard hardtail
| Size | Wheel | Reach (mm) | Stack (mm) | Effective top tube (mm) | Head angle (°) | Seat angle (°) | Chainstay (mm) | Wheelbase (mm) | Seat tube (mm) | Head tube (mm) | BB drop (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M | 29 in | 456 | 594 | 615 | 66 | 75 | 444 | 1216 | 343 | 100 | 25 |
| L | 29 in | 474 | 603 | 635 | 66 | 75 | 444 | 1238 | 381 | 110 | 25 |
| XL | 29 in | 496 | 612 | 660 | 66 | 75 | 444 | 1265 | 431 | 120 | 25 |
Full Specification
eBlizz 90 S, current UK build
| Item | Specification |
|---|---|
| Frame | Aluminium 6061-T6 hardtail, Trail Ultimate geometry |
| Fork | RockShox Judy Silver TK Solo Air, tapered, 15x110 mm axle, 130 mm travel |
| Motor | Shimano STEPS DU-EP600 mid-drive, 85 Nm, 36 V, 250 W |
| Battery | Darfon integrated removable battery, 504 Wh, 36 V |
| Charger | Darfon 4A Smart Plus charger; Halfords quotes up to 8 hours recharge time |
| Display | Shimano SC-E5003 |
| Maximum range | Up to 120 km (manufacturer maximum) |
| Assistance limit | 15.5 mph |
| Drivetrain | Shimano CUES 1x10; SL-U6000 shifter, RD-U6000 derailleur and 11-48T CS-LG400 cassette |
| Automatic shifting | Not fitted; EP600 described as Auto Shift compatible, stock CUES is manual |
| Brakes | Shimano MT200 hydraulic disc brakes with 180 mm front and rear rotors |
| Wheels and tyres | 29-inch Stars J30 rims, Solon DH919 hubs and Rubena Cheetah 29x2.35-inch tyres |
| Seatpost | 30.9 mm dropper post; manufacturer describes 150 or 170 mm size-dependent travel, retailer specification lists 170 mm |
| Claimed weight | 23.35 kg (claimed); UK retail data approximately 24 kg |
| Maximum rider weight | 120 kg (retailer maximum) |
| Mounts | Mudguard mounts present; no pannier mounts or built-in kickstand |