3T Exploro Boost Racemax GRX 1 x 11 E-Bike

Regular price £7,299.00

Tax included.


Our Demo bike is now for sale. Only 250 miles on the road, no Gravel riding.

Full warranty available.

Weighing in at only 10.5kg the newly launched 3T Exploro Racemax Boost e-bike is perfect for gravel & all-road riding. It’s light yet tough, agile yet planted and fast yet fun.

This makes the Racemax Boost a great range-extender on your gravel or road adventure. Or it can help you keep up with faster friends on road and gravel rides. It can even be a great commuter: arrive without a sweat, integrate an adventurous workout on the way home.


The Racemax has won many awards as the fastest performance gravel bike on earth. The Racemax Boost uses the same frame - all electronic parts fit neatly inside without the need for bulkier tubes or visible cables. So you keep all the performance features of the original Racemax and add one more: extra power whenever you need it.


3T's goal was to keep the fun and flow of a fast, agile gravel bike, not to build a motorcycle with pedals. That means the system has to be very light, offer a very smooth power build-up & create no drag when turned off. In the end, 3T’s customized Mahle X-35 system offers all three.


The Exploro Boost is currently available with drop handlebars and a flat bar version is available in the Autumn of 2021.

Colour: Grey/Grey (only this colour available at the moment).

Find out more about the Exploro Boost and geometry  HERE

Frame: Exploro RaceMax - BOOST
Motor: Mahle ebikemotion X35 System for natural power support up to 250W in super light pack
Battery: 250 kWh hidden battery included. Optional second battery available under the downtube (both front triangle cages remain available for water bottles)
Frame material: Unidirectional pre-preg carbon, High-modulus/high-strength performance blend layup
Fork: Fango RaceMax w/ compact crown
Headset: 3T MinMax custom by Cane Creek IS42/28.6 + IS 47/38
Handlebar: Superergo PRO (XXS: 38cm - 51: 40cm - 54&56: 42cm - 58&61: 44cm) 
Stem:  3T Apto Stealth (XXS: 70mm - 51: 80mm - 54: 90mm - 56: 100mm - 58: 110mm - 61: 120mm)
Front Derailleur: none
Rear Derailleur: Shimano GRX - long cage mechanical (RX-812)
Shift/brake levers: Shimano GRX (mechanical)
Brakes: Shimano GRX Flat Mount Hydraulic Disc w/ Shimano 160 mm 6-bolt rotor
Crankset: Shimano GRX, 40T chainring (XXS: 165mm - 51: 170mm - 54&56: 172,5mm - 58&61: 175mm)
Cassette: 11-speed Powerglide, 11-42T
Wheelset: 3T Discus 45 | 40, tubeless ready
Tires: Pirelli Cinturato Gravel M, 700c, 37mm WAM, tubeless-ready or Panaracer GravelKing TLC, 700c, 41mm WAM, tubeless-ready
Seatpost: New 3T Charlie Sqaero Team w/ Ritchey WCS Clamp
Saddle: Selle Italia Novus Evo Boost Superflow or WTB SL8 (depending on availability)
XXS 51 54 56 58 61
Seat angle (degrees) 74.5 74 73.5 73 72.5 72.5
Head angle (degrees) 69 69.5 71 72 72 72
Chainstay (cm) 41.5 41.5 41.5 41.5 41.5 41.5
Seat tube (cm) 43.6 46.3 49 51.8 54.5 57.2
Top tube (cm) 50.6 52.6 54.6 56.6 58.6 60.6
Bottom bracket drop (cm) 7.9 7.9 7.7 7.7 7.5 7.5
Wheelbase (mm) 998 1,008 1,008 1,014 1,024 1,044
Stack (cm) 52 54.2 56.4 58.4 60.4 63.2
Reach (cm) 35.5 36.6 37.7 38.5 39.3 40.4
All you need to do is:
1 - insert the front wheel
2 - mount the bars on the stem
3 - install the seatpost