Quiver

Mondraker2026

2026 Mondraker Summum R

Downhill

The 2026 Mondraker Summum R sits more aggressive than most downhill bikes, with a slacker head angle and a shorter rear center. Reach 450 to 510 mm, stack 642.6 to 642.6 mm. The Summum R build comes with SRAM GX DH shifting and E*thirteen Grappler Flux wheels.

Source: mondraker.com. Checked .

Key facts

Model
Summum
Model year
2026
Frame
R
Geometry labels
M, L, and XL
Drivetrain
SRAM GX DH
Source
mondraker.com
Checked

Things to know

Compared with other downhill bikes on frame geometry alone.

  • Slacker head angle than 9 in 10 downhill bikes: 62.5 degrees, where most sit near 63.5.
  • Longer chainstays than 9 in 10 downhill bikes: 455 mm, where most sit near 438.

Geometry by size

2026 Mondraker Summum R geometry drawing, size XLSide view of the 2026 Mondraker Summum R frame in size XL, drawn to scale from its published geometry, with lettered dimension lines.J 1345A 510mmB 643mmJ 1345mmH 455mmK 5mmC 770mmD 62.5°E 68.0°F 120mmG 400mmN 351mmM 602mm
Geometry drawing, size XL, to scale.
2026 Mondraker Summum R geometry by size
MeasurementMLXL
Reach(mm)450480510
Stack(mm)642.6 (from the manufacturer)642.6642.6 (from the manufacturer)
Head tube angle(°)62.5 (from the manufacturer)62.562.5 (from the manufacturer)
Seat tube angle(°)68 (from the manufacturer)68 (from the manufacturer)68 (from the manufacturer)
Effective top tube(mm)709.63 (from the manufacturer)739.63 (from the manufacturer)769.63 (from the manufacturer)
Chainstay length(mm)455 (from the manufacturer)455455 (from the manufacturer)
Wheelbase(mm)1285.38 (from the manufacturer)Not available1345.38 (from the manufacturer)
BB drop(mm)5 (from the manufacturer)5 (from the manufacturer)5 (from the manufacturer)
BB height(mm)350.5 (from the manufacturer)Not available350.5 (from the manufacturer)
Seat tube length(mm)400 (from the manufacturer)400 (from the manufacturer)400 (from the manufacturer)
Fork length(mm)601.9 (from the manufacturer)601.9 (from the manufacturer)601.9 (from the manufacturer)
Head tube length(mm)120 (from the manufacturer)120 (from the manufacturer)120 (from the manufacturer)
Sources agreeManufacturerNot available

Requested. Requests decide what we research next.

Stock build

25 parts

Frame

Mondraker Summum MX
Frame

Suspension

Fox Float GRIP Performance
ForkFrom the manufacturer: Wheel size 27.5
Fox DHX2 Performance elite
Rear shockFrom the manufacturer: External adjustments climb switch

Drivetrain

Shifter
SRAM GX DH
DerailleurFrom the manufacturer: Speeds 7
Cassette
SRAM Truvativ Descendant DH
CranksetFrom the manufacturer: Crank length 165mm
ChainringTeeth 40 tMount standard 110 SRAM Asymmetric BCDMaterial Aluminum
Bottom bracket

Wheels & Tires

Brakes

SRAM Maven Base
BrakeFrom the manufacturer: Piston count 4From the manufacturer: Fluid type MineralFrom the manufacturer: Pad compound Organic
Centerline XR
Rotor
Centerline XR
Rotor

Cockpit

HandlebarFrom the manufacturer: Width 800mm
Onoff S9 DH CNC Integrated
Stem
Onoff Desert
Grips

Seatpost & Saddle

Onoff S3 DH Alloy
Seatpost

Keep your Summum R in Quiver

Start from this build's stock parts, then record your upgrades. Review it before adding it to your garage.

Free on App StoreFree on Google PlayFree for your first bike, on iPhone and Android.

Already have Quiver? Open this build

Sources agreeManufacturer

Quick answers

Which size or configuration labels have geometry for the 2026 Mondraker Summum R?
Geometry is listed for M, L, and XL.
What are the reach and stack of the 2026 Mondraker Summum R in size L?
In size L, reach is 480 mm and stack is 642.6 mm.
What is the head tube angle of the 2026 Mondraker Summum R?
The head tube angle is 62.5 degrees in every size.
What does the 2026 Mondraker Summum R ship with?
The stock build includes Mondraker Summum MX, Fox Float GRIP Performance, SRAM GX DH, and E*thirteen Grappler Flux.
Which years of the Mondraker Summum are on Quiver?
Quiver has the Mondraker Summum for 2026, 2027, 2025, and 2024.

Know what is on every bike.

Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.

Explore the app
A Transition Relay build sheet: frame, fork, shock and drivetrainThe Relay’s ride photo galleryThe Relay’s ride spectrum and 2D frame geometryThe garage: five bikes and 99 recorded partsA Specialized Tarmac SL8 road build sheet

Quiver keeps track of the bikes you own.

Free on App StoreFree on Google Play