Sunn Radical S1 vs Lapierre Xrm 6.9

Sunn

Radical S1

Lapierre

Xrm 6.9

High endEnduroFull suspensionCarbon2026

Mid-rangeFull suspensionCarbon29"2025

Close on the specs and the list price: here are their 20 differences, line by line.

SunnSunn Radical S1

LapierreLapierre Xrm 6.9

At a glance

Differences only

Lapierre Xrm 6.9 is 3.5 kg lighter than Sunn Radical S1 (brand figures).
Sunn Radical S1 has 50 mm more fork travel than Lapierre Xrm 6.9.
Sunn Radical S1 is the newer model (2026).

Key specs9 differences

Model year 2026 2025

Weight 16.7 kg 13.2 kg ^{°Value not published by the brand}−3.5 kg

Frame Carbon

As printed

Full carbon Toray Enduro Boost, integrated, 160 mm

Carbon

As printed

Cadre : HIGH Carbon Gents

Suspension Full suspension, 170 / 160 mm

As printed

Débattement : 170/160 (av/ar)

Full suspension, 120 / 120 mm

As printed

Débattement arrière : 120 mm

Fork model RockShox ZEB Debonair+ Rush RC Higher range

As printed

RockShox ZEB, Debonair+, Rush RC, 170 mm, Boost, tapered

FOX Factory 34 Float SC Performance

As printed

Fourche : FOX Factory 34 Float SC Performance, 120 mm

Shock RockShox Super Deluxe Select Trunnion 205/60 Higher range

As printed

Amortisseur : RockShox Super Deluxe Select Trunnion 205/60

FOX Factory Float Performance Elite Series, 210x50mm

As printed

Amortisseur : FOX Factory Float Performance Elite Series, 210x50mm

Wheelset 29" · E-Thirteen LG1+ / Brute One

As printed

Jantes : E-Thirteen LG1+, 29'', 32T ; Moyeu : Brute One, 32T, Boost, thru axle

29" · Mavic XC 425 DISC 25x622 ^{°Value not published by the brand}

Drivetrain 1×12 1×12

Groupset Shimano XT / Deore

As printed

Dérailleur arrière : Shimano XT RD-M8100, 12V ; Manette : Shimano Deore SL-M6100, 12V

Shimano Deore XT M8100 12 vitesses

As printed

Derailleur Arrière : Shimano Deore XT RD-M8100-SGS 12s, Shadow +

Brake model Formula Cura 2

As printed

Freins : Formula Cura 2, 220/203

Shimano MT64 180mm/160mm Centerlock ^{°Value not published by the brand}

Seatpost Dropper · BRUTE DROPPER 130MM (S)

As printed

Tige de selle : Brute Dropper, 130 mm (S), 150 mm (M), 170 mm (L/XL)

Dropper · Lapierre dropper, Ø: 31.6mm, travel 100mm (S,M)

As printed

Tige de selle : Lapierre Dropperpost YSP18, Dia. 31.6 mm, Travel: 100 mm

Prices

Each model's retailers, delivered to your country, and their prices over time.

Sunn Radical S1

Lapierre Xrm 6.9

Affiliate links: no extra cost for you ♥

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.

Radical S1 · Mountain bike rather for smooth ground, average gearing, rather high equipment.
Xrm 6.9 · Mountain bike rather demanding, average equipment.

Terrain

EasyDemanding

Gearing

Speed in the lowest and the highest gear at 90 rpm: lower on the left climbs easier, higher on the right goes faster.

Sunn Radical S18 km/h - 40 km/h

Easiest gear (climbing)Hardest gear (descending)

Sunn Radical S1Lapierre Xrm 6.9other enduro mountain bikes

Components and specs

Every spec line by line; the higher range of a component is marked. The technical groups are folded.

Ride type

Discipline Enduro –

Frame and fork

Axles Thru-axles

As printed

Brute One, 32T, Boost, thru axle

Thru-axles ^{°Value not published by the brand}

As printed

XR full Carbon 110mm travel 29’’, pressfit, boost, metric, Thru axle

Bottom bracket– SRAM DUB PF 92 MTB Wide ^{°Value not published by the brand}

Suspension2 differences

Fork travel 170 mm 120 mm −50 mm

Rear travel 160 mm 120 mm −40 mm

Drivetrain3 differences

Groupset brand Shimano

As printed

Shimano XT RD-M8100, 12V

Shimano

As printed

Derailleur Arrière : Shimano Deore XT RD-M8100-SGS 12s, Shadow +

Mixed groupset yes yes

Shifting Mechanical ^{°Value not published by the brand}

As printed

SHIMANO XT RD-M8100 12V AR

Mechanical

As printed

Levier de vitesse droit : Shimano Triggershift SLX SL-M7100-IR, Rapidfire+

Chainrings 1 1 ^{°Value not published by the brand}

Gears at the back 12 12

Chainring teeth Shimano MT512 32T 165 mm

As printed

Pédalier : Shimano MT512, 12V, 165 mm, 32T

FC-MT612-1, 2-Piece-Crankset

As printed

Pédalier : FC-MT612-1, 2-Piece-Crankset

Cassette Shimano Deore CS-M6100 10-51

As printed

Cassette : Shimano Deore CS-M6100, 12V, 10-51, Microspline

Shimano Cassette Deore CS-M6100-12, MICRO SPLINE

As printed

Cassette : Shimano Cassette Deore CS-M6100-12, MICRO SPLINE

Rear derailleur SHIMANO XT RD-M8100 12V AR ^{°Value not published by the brand}Higher range Shimano Deore XT 12s Shadow + ^{°Value not published by the brand}

Shifters– Shimano SLX 12s Rapidfire ^{°Value not published by the brand}

Crank length 165 mm –

Brakes

Brakes Hydraulic disc ^{°Value not published by the brand}

As printed

Formula Cura Disque hydraulique

Hydraulic disc ^{°Value not published by the brand}

As printed

Shimano Disque hydraulique

Front rotor 220 mm –

Rear rotor 203 mm –

Wheels and tyres2 differences

Wheel size 700c / 29"

As printed

Taille des roues : 29''

700c / 29"

As printed

Taile des roues 29

Rims Aluminium ^{°Value not published by the brand} Aluminium ^{°Value not published by the brand}

Tubeless ready yes –

Tyres Michelin Wild Enduro MS Racing Line

As printed

Michelin Wild Enduro MS Racing Line, 29x2.40, TLR

Maxxis Ardent Race EXO TR 2.35 60 TPI 60-622

As printed

Pneus : Maxxis Ardent Race EXO TR 2.35 60 TPI 60-622

Tyre width fitted 61 mm ^{°Value not published by the brand} 60 mm −1 mm

Cockpit and seatpost4 differences

Dropper travel– 100 mm

Handlebar width 780 mm 760 mm ^{°Value not published by the brand}−20 mm

Handlebar 3D FORGED ALLOY, INTEGRATED 31.8X45MM ^{°Value not published by the brand} Lapierre Thirty One 6061DB, Width: 760mm, Rise: 15mm, Ø: 31.8mm ^{°Value not published by the brand}

Stem 3D FORGED ALLOY, INTEGRATED 31.8X45MM ^{°Value not published by the brand} Lapierre AL6061 alloy, -6°, Ø: 31.8mm ^{°Value not published by the brand}

Seatpost model BRUTE DROPPER 130MM (S) ^{°Value not published by the brand} Lapierre dropper, Ø: 31.6mm, travel 100mm (S,M) ^{°Value not published by the brand}

Weight

Max total weight– 120 kg

° Value not published by the brand

Geometry

A size per bike (the nearest to the first one's at first), the differences measured from the reference bike.

Size of Radical S1

Differences measured from

Stack and reach

Radical S1 · M Radical S1 · M — Reach (mm) 460 · Stack (mm) 637

Geometry

Size M –

Reach 460 mm –

Stack 637 mm –

Top tube (effective) 601 mm –

Seat tube 410 mm –

Head tube 110 mm –

Head angle 64° –

Seat angle 77.5° –

Chainstays 445 mm –

Wheelbase 1,250 mm –

Front centre 806 mm –

Fork offset 0 mm –

Where to buy them

Sunn Radical S1
Its full spec sheet Compare the whole Sunn Radical range
Lapierre Xrm 6.9
Its full spec sheet Compare the whole Lapierre Xrm range

Compare the whole Sunn Radical range Compare the whole Lapierre Xrm range

Frequently asked questions

Which is lighter, Sunn Radical S1 or Lapierre Xrm 6.9?

Lapierre Xrm 6.9 weighs 13.2 kg, Sunn Radical S1 16.7 kg, as their brands give them.

What groupset do Sunn Radical S1 and Lapierre Xrm 6.9 come with?

Sunn Radical S1: Shimano XT / Deore. Lapierre Xrm 6.9: Shimano Deore XT M8100 12 vitesses.

Compare other models

Sunn Radical S1 vs Lapierre Xrm 6.9

At a glance

Prices

Character

Gearing

Components and specs

Geometry

Stack and reach

Where to buy them

Frequently asked questions

Other comparisons