
R.X750
PRO (HT)
Switch on. Get on. Accelerate. The mountain’s calling. And the Big Mountain hardtail R.X750 HT answers this call. Built for alpine terrain, interlocking single trails, first descents and virgin terrain. A bike must prove itself away from the well-known - reliability, handling and performance play a decisive role here.
With its light, full carbon frame the R.X 750 HT possesses all these properties and more. For example, the integrated 750 Wh power unit and the Brose Drive S-Mag motor both deliver solid performance and range. With a maximum of 90 Nm torque and improved responsiveness the motor shows how good it is, particularly in technical terrain. The motor decouples 100% beyond 25 km/hr enabling easy pedalling without resistance at high speeds. The levels of support can be individually set with the motor's own Smartphone app, from efficient up to extremely powerful, corresponding perfectly to individual requirements. The modern, shallow trail geometry with 66° steering tube angle and Fox 36” fork with 120 mm travel are tools for winding descents on mountain trails and moderate Alpine terrain. Great freedom of movement and agility are also provided by the Eightpins seat post and low set top tube. The R.X750 HT - a tough performer with great characteristics.




Features

Modern, shallow trail geometry with 66° steering tube angle and 120 mm Fox 36 fork. Built for alpine terrain. Tough performer with great characteristics.
If blocked single trails in alpine terrain and technical challenges are what you love, the hardtail Big Mountain R.X750 is the bike for you. The lightweight full carbon frame, the Fox 36 forks with 120 mm of suspension travel and the low trail geometry with a steering angle of 66° make it a reliable partner for mountain riders who want to conquer summits but do not go for the most extreme descents.
With its Eightpins seat post and low top tube, the R.X750 hardtail offers you plenty of freedom of movement and agility. The combination of a 29 front wheel and 27.5 rear wheel guarantees outstanding handling. The 29x2.4 tyre on the front provides excellent rollover resistance and reduces the feeling of front-tipping in downhill sections, while the 27.5x2.6 tyre on the back gives better traction.
You will no longer feel intimidated by long steep climbs and all-day touring in rough terrain with the IPU750 integrated power unit and the Brose Drive S Mag motor to help you. The new tailor-made lightweight ROTWILD battery sets new standards. It produces 750 Wh and is based on the latest 21700 cell technology. The powerful Brose Drive S Mag motor has a maximum power output of 90 Nm over a broad cadence range and a faster response in technical terrain. In addition, the motor cuts out completely at the statutory speed limit, which allows you to pedal without resistance at speeds above 25 km/h. You can use a smartphone app to customise the levels of support, from highly efficient to extremely powerful, to suit your personal preferences.
DETAILS
- ROTWILD full carbon e-mtb frame
- FOX 36 Performance / E-Bike+
- BROSE S-Mag Motor
- 750 Wh Battery / aluminium housing
- CONNECT C Bluetooth interface and app
- SHIMANO XT drive train / 12-speed cassette
- SHIMANO XT 4 piston disc brake
- 203 mm Ice Tec discs / integrated speed sensor
- DT SWISS HX1501 SPLINE ONE wheel set
- 8PINS H01 seatpost / up to 230 mm travel
- ACROS head set with integrated rotational stop
- MONKEYLINK integrated light preparation (front)
Geometry

FRAME SIZE | S | M | L | XL | |||
A | SEAT TUBE LENGTH | [mm] | 413 | 444 | 473 | 509 | |
B | TOP TUBE LENGTH* | [mm] | 572 | 615 | 653 | 687 | |
C | HEAD TUBE LENGTH | [mm] | 110 | 110 | 130 | 145 | |
D | CHAIN STAY LENGTH | [mm] | 445 | ||||
E | BB HEIGHT | [mm] | 306 | ||||
F | BB DROP | [mm] | 60 | ||||
G | HEAD TUBE ANGLE | [ ° ] | 66,5 | ||||
H | SEAT TUBE ANGLE | [ ° ] | 74 | ||||
I | REACH | [mm] | 398 | 428 | 460 | 491 | |
J | STACK | [mm] | 644 | 644 | 662 | 676 | |
K | WHEEL BASE | [mm] | 1147 | 1177 | 1218 | 1254 | |
L | STANDOVER | [mm] | 718 | 745 |
Configuration
- Headset
-
ACROS RW750 1.5 HEADSET W/ BLOCKLOCK
- Fork
-
FOX 36 FLOAT PERFORMANCE
120 MM / 3-POS GRIP / E-BIKE+ - Handlebar
-
B35
Ø35 mm / 15 mm rise / 780 mm width - Stem
-
S35
Ø35 mm / 50 mm / MonkeyLink ready - Seatpost
-
EIGHTPINS H01
Ø34.9 mm / OFFSET / 144 mm (S) / 162 mm (M) / 178 mm (L) / 196 mm (XL) - Saddle
-
ERGON SM-E MOUNTAIN SPORT
- Grips
-
ERGON GD10 SLIM FACTORY FROZEN
- Cranks
-
E13 PLUS
160 mm (S) / 165 mm (M, L) / 170 mm (XL)
- Shifter
-
SHIMANO XT I-SPEC EV
- Rear Derailleur
-
SHIMANO XT 8100 12-Speed
- Cassette
-
SHIMANO CS 7100 10-51T. 12-SPEED
- Brakes
-
SHIMANO XT 8120 FIN PAD
- Discs
-
SHIMANO RT800/810 SENSOR ICE 203/203
- Wheel
-
DT SWISS HX1501 SPLINE ONE (30)
110-15/148-12 TAS CL - Tires
-
CONTINENTAL BARON PROJEKT
PROTECTION 29x2.40 / 27.5x2.60 - Battery
-
IPU750 REMOVABLE
- Display
-
BLOKS 14D / CONNECT C
- Motor
-
BROSE DRIVE S MAG
AIR COOLER
from 6,499 €
(suggested retail price, may vary due to national VAT)

Big Mountain
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