Born in Belgium | Designed in Scotland | Ridden Worldwide

HUP enduro MTB Hardtail Frame


Brand HUP™

The new HUP enduro: a youth MTB hardtail that climbs as well as it descends…

Lightweight, full-sized wheels, boost axles and enduro-focused geometry for youth riders age 6+ creating a unique hardtail that changes the game for youth and small adult riders, here's why;

  • Progressive Geo: super-low standover, youth top-tubes, slack 65º fork, up to 120mm forks for riders 120cm+
  • Full Size Wheels: choose 27.5"or 29er (world's smallest) or Mixed - in Aluminium or Carbon, up to 2.4" tyres
  • Still Lightweight: strong, double-butted 7005 in 3 sizes for youth/small adult riders and as light as 9.5kg!
  • Custom Components: short cranks, dropper posts, big gearing, hydraulic brakes (+ upgrade sizes as they grow)
  • Quality Throughout: only top brands including SRAM, FSA, Jagwire, Fulcrum, Rockshox, Manitou, Tekro & KMC
  • Build Flexibility: frame only to build using your own parts

Lightweight and capable of even the most technical descents - but still happy to climb. Now they can roll over trouble, not into it, because trails are designed for adult size wheels - not 24” wheels. That’s why our test squad love them!

Low maintenance design with full length outer (internally run) cabling, including option to fit a dropper post. Child-specific ‘progressive’ geometry with a 65 degree fork angle (controlled descending), proportional top-tube and short stems for correct fit. Super-low standover/low stack giving small riders the space to move, dropper post ready for tiny legs from just 60cm inside leg.

Big wheels on clever geometry and correct components, the advantages of running 27.5” or 29” for riders more typically on 20”/24”/26” wheels are very real. Roll over trouble, not into it. Trails are designed for adult size wheels, not 24” wheels. Parents also benefit from component sharing (life is simple with everyone on the same size wheels!) and accessing quality upgrades from adult bikes like soft compound, lightweight enduro tyres or carbon wheelsets.

Included: frame, headset, mech hanger, thru-axle & cable fittings...

Frame Material: Aluminium Alloy 7005 (double-butted)
Frame Weight: 13": 1675g | 15.5": 1775g | 17.5": 1870g
Colour: Grey (we always recommend you fit frame protection tape)
Headset: Semi-integrated FSA No.42 ACB 1 1/2" lower, 1 1/8" upper (requires bearing cups to be press-fitted into headtube)
Brake Type: Post mount disc: 160mm or 180mm rotors
Fork Size: 80mm, 100mm or 120mm travel max (37mm/44mm offset)
Seatpost Diameter: 27.2mm
Bottom Bracket: 73mm BSA English threaded
BB Axle length: 123mm (130m-140mm HUP cranks) or 127mm (145mm-155mm HUP cranks) with 2mm chainring spacers.
Rear Axle OLD: 148mm Boost Shimano 12mm thru-axle, 52mm chainline
Tyre Clearance: 29"/27.5" x 2.4"
Maximum Gearing: 34T (1x) on HUP cranks
Cabling: internal downtube/top-tube
Note: This is not a Dirt Jump or Downhill bike - ASTM Category 3 riding.

Age Range: 6-years old and up.
Recommended Min Inside Leg (bare-foot) on 27.5" wheels/100mm fork**: 55cm (13") | 62cm (15.5") | 68cm (17.5") or see Sizing Guide
We measure our bikes from the floor up to the top-tube, in-front of the saddle, then minus 2-4cm for shoes.