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Sunn Radical S1 Shimano XT Rd-m8100 12v

High endEnduroFull suspensionCarbon
Sunn Radical S1 Shimano XT Rd-m8100 12v, side view

Sunn Radical S1 Shimano XT Rd-m8100 12v

enduro full suspension mountain bike, carbon frame, 29" wheels, 1×12 drivetrain, high end equipment

Key specs

Model year
2026
Weight
16.7 kg
Frame
Carbon
Suspension
Full suspension, 170 / 160 mm
Fork model
RockShox ZEB Debonair+ Rush RC
Shock
RockShox Super Deluxe Select Trunnion 205/60
Wheelset
29" · E-Thirteen LG1+ / Brute One
Drivetrain
1×12
Groupset
Shimano XT / Deore
Brake model
Formula Cura 2
Seatpost
Dropper · BRUTE DROPPER 130MM (S)

Character

The bike at a glance: the ground it is made for, how it handles, its gears and its equipment, beside the other bikes of its kind.

« Mountain bike rather for smooth ground, rather high equipment. »

Terrain
1 bike1 bike3 bikes · Radical S1 Shimano XT Rd-m8100 12v4 bikes
EasyDemanding

As at ease on rough ground as most other enduro mountain bikes.

Not enough data yet for this chart: it fills in as soon as the specs are in.

Gearing

  • This bike: Radical S1 Shimano XT Rd-m8100 12v8 km/h - 40 km/h
Easiest gear (climbing)Hardest gear (descending)

From 8 km/h in its easiest gear to 40 km/h in its hardest.

Equipment level

Not enough data yet for this chart: it fills in as soon as the specs are in.

Equipment: high end for its category.

Equipment score: 61/100 (frame, groupset, wheels, suspension).

Radical S1 Shimano XT Rd-m8100 12vother enduro mountain bikes

Spec sheet

Every value is read on the brand’s page; hover it to see its source and date.

Ride type

Discipline
Enduro
Suspension
Full suspension

Frame and fork

Frame
Carbon
Axles
Thru-axles

Suspension

Fork travel
170 mm
Rear travel
160 mm
Fork model
RockShox ZEB Debonair+ Rush RC
Shock
RockShox Super Deluxe Select Trunnion 205/60

Drivetrain

Groupset brand
Shimano
Groupset
Shimano XT / Deore
Mixed groupset
yes
Shifting
Mechanical
Chainrings
1
Gears at the back
12
Chainring teeth
Shimano MT512 32T 165 mm
Cassette
Shimano Deore CS-M6100 10-51
Rear derailleur
SHIMANO XT RD-M8100 12V AR
Crank length
165 mm

Brakes

Brakes
Hydraulic disc
Brake model
Formula Cura 2
Front rotor
220 mm
Rear rotor
203 mm

Wheels and tyres

Wheel size
700c / 29"
Wheelset
E-Thirteen LG1+ / Brute One
Rims
Aluminium
Tubeless ready
yes
Tyres
Michelin Wild Enduro MS Racing Line
Tyre width fitted
61 mm

Cockpit and seatpost

Seatpost
Dropper
Handlebar width
780 mm
Handlebar
3D FORGED ALLOY, INTEGRATED 31.8X45MM
Stem
3D FORGED ALLOY, INTEGRATED 31.8X45MM
Seatpost model
BRUTE DROPPER 130MM (S)

Weight

Weight
16.7 kg

Geometry

Geometry size
M
Stack
637 mm
Reach
460 mm
Head angle
64 °
Seat angle
77.5 °
Chainstays
445 mm
Wheelbase
1,250 mm

Spec sheets read at: sunn.fr

The range

Its comparisons

Comparable mountain bikes

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Who is it for?

The sports the brand announces, and the features that go with them.

  • Cycling

    • Discipline: Enduro
    • Suspension: Full suspension
    • Fork travel: 170 mm
    • Wheel size: 700c / 29"

Frequently asked questions

Is the Sunn Radical S1 Shimano XT Rd-m8100 12v a hardtail or a full suspension?

Full suspension, according to the brand.

How much travel does the Sunn Radical S1 Shimano XT Rd-m8100 12v fork have?

170 mm, according to the brand.

Does the Sunn Radical S1 Shimano XT Rd-m8100 12v come with a dropper post?

Seatpost: Dropper, according to the brand.

Specs updated on Nov 4, 2026Some values come from third-party spec databases, cross-checked with the brand where it publishes them.Report an error