SUMMUM R

DH

components

Technical specifications

  • Frame

    Summum 6061 Alloy Stealth Evo, hydroformed tubing, Zero suspension system, 205mm travel, Forward Geometry, alloy upper link with shock eyelet bearings, 12x150mm rear axle, 73mm BSA bottom bracket, MAX. capacity sealed bearings, internal or external cable routing, ISCG 05. *Optional Geometry kit

    Sizes

    S: 400mm / M: 400mm / L: 400mm / XL: 400mm

  • Rear shock

    Fox DHX2 Performance Elite, 222x70mm. Settings: low-speed compression, low-speed rebound, spring preload

    Shock setting

    Firm compression. Spring rate: S size 450 lbs, M size 500 lbs, L/XL size 550 lbs

  • Fork

    Fox 40 27´5 Float FIT GRIP2 EVOL Factory Kashima, 203mm, air spring, 1-1/8” steerer tube, 20x110mm axle. Settings: high and low-speed compression, high and low-speed rebound, air preload

    Headset

    Onoff Mercurium 1.5 ZS for 1-1/8” steerer tube, 41x30.15x7x45°x45° ACB sealed bearings, geometry kit cups, external diameter 56mm

  • Stem

    Onoff Krypton DH CNC Integrated FG, 25-30mm adjustable length, 31.8mm barbore, 6061 alloy, 2x6mm spacer

    Handlebar

    OnOff Sulfur 1.0 double butted 6061 alloy, rise: 20mm, width: 780mm, 9° backsweep, 5° upsweep, 31.8mm barbore

  • Grips

    Onoff Desert, 1lock-on, 135mm sizes: S/M L/XL

    Seatpost

    SDG Micro I-Beam SP-751 Alloy, diameter 31.6mm, length 300mm, micro-adjustment

  • Saddle

    SDG I-Fly 2.0 I-Beam, high-density PU foam, Cordura sides

    Front brake

    Shimano Zee M640, 4-piston caliper, RT66 203mm IS 6 bolts rotor, resin pads

  • Rear brake

    Shimano Zee M640, 4-piston caliper, RT66 203mm IS 6 bolts rotor, resin pads

    Brake lever

    Shimano Zee, ergonomic antiskid lever with servo wave, tool less reach adjust

  • Rim

    Mavic DeeMax DH Tubeless 27,5", 28mm internal width, hookless, aluminum Maxtal, 28 holes

    Spokes

    Mavic stainless steel

  • Front hub

    Mavic, 20x110mm, IS 6 bolts

    Rear hub

    Mavic, 12X150mm, IST-4 QRM, alloy hub body, IS 6 bolts

  • Front tyre

    Maxxis Minion DHR II 27’5x2.4, Super Tacky compound, Wire bead

    Rear tyre

    Maxxis Minion DHR II 27’5x2.4, Super Tacky compound, Wire bead

  • Crank

    Shimano Zee M640, alloy, reinforced steel axle, 165mm

    Rings

    aluminium, 36T

  • Bottom bracket

    Shimano 73mm

    Pedals

    /

  • Chain

    Shimano HG54, 10s

    Front  derailleur

    E.13 LG1 chain guide + DMB (Direct Mount Bashguard) Gen 2 Stealth Idler, Aluminum hardware, adjustable/replaceable lower armature, polycarbonate, ISCG 05, adjustable upper slider

  • Rear derailleur

    Shimano Zee RD-M640-SS, 10s, Shadow+, short cage

    Lever

    Shimano Zee SL-M640, 10s, 2-way release

  • Sprocket

    Shimano CS-HG500-10, 11-25T, 10s

    Hanger

    Mondraker M051

  • Others

    *Optional Geometry kit: chainstay and brake adaptors for 445mm, 450mm, 455mm, 460mm. Steering cups: +/- 1º, +/-2º

    Weight without pedals

    16.4 kg

Measurements

Geometry

  Frame size S M L XL
A Seat Tube Lenght 400mm 400mm 400mm 400mm
B Top Tube Lenght 575mm 600mm 622mm 647mm
C Bottom Bracket Drop 0mm 0mm 0mm 0mm
D Bottom Bracket Height 350mm 350mm 350mm 350mm
E Chainstay Lenght 445-460mm 445-460mm 445-460mm 445-460mm
F Seat Tube Angle, Actual 65° 65° 65° 65°
G Seat Tube Angle, Effective 73.5° 73.5° 73.5° 73.5°
H Head Tube Angle 63°(+/-2°) 63°(+/-2°) 63°(+/-2°) 63°(+/-2°)
I Fork Offset 52mm 52mm 52mm 52mm
J Wheelbase 1200mm 1225mm 1250mm 1280mm
K Head Tube Lenght 112mm 112mm 122mm 122mm
L Reach 397mm 422mm 442mm 468mm
M Stack 597mm 597mm 606mm 606mm

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