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Lapierre Prorace 3.9 vs Sunn Exact S1

Lapierre Prorace 3.9, side view

Lapierre

Prorace 3.9

Sunn Exact S1, side view

Sunn

Exact S1

Entry levelCross-countryHardtailAluminium2026
Entry levelCross-countryHardtailAluminium2026

Close on the specs and the list price: here are their 14 differences, line by line.

Lapierre Prorace 3.9, side viewLapierreLapierre Prorace 3.9
Sunn Exact S1, side viewSunnSunn Exact S1

At a glance

  • Lapierre Prorace 3.9 is 1.1 kg lighter than Sunn Exact S1 (brand figures).
Key specs6 differences
Model yearSame for all 2026 2026
Weight 12.9 kg °Value not published by the brandBest of the comparison 14 kg +1.1 kg
FrameSame for all Aluminium
As printed

Cadre : HIGH Aluminium Uni

 Aluminium °Value not published by the brand
SuspensionSame for all Hardtail, 100 mm
As printed

VTT de cross-country semi-rigide

 Hardtail, 100 mm °Value not published by the brand
Fork model Rockshox Judy Silver TK Crown Adjust Boost
As printed

Fourche : Rockshox Judy Silver TK Crown Adjust Boost, 100 mm

 ROCKSHOX JUDY SILVER TK, 100MM
Wheelset 29" · Rodi Tryp25 25x622 °Value not published by the brand 29" · MACH 1 ER20 DISC, 19MM
Groupset Shimano Deore M6100 12 vitesses
As printed

Derailleur Arrière : Shimano Deore RD-M6100-SGS 12s, Shadow+

 Shimano Deore
As printed

SHIMANO DEORE RD-M6100 SHADOW +, 12V / SHIMANO DEORE SL-M6100 12V

Brake model Shimano Hydraulic Disc brake MT401 2 pistons °Value not published by the brand SHIMANO MT200 160/160
Seatpost Rigid · Lapierre Non Suspension Alloy, Ø: 27.2 mm
As printed

Tige de selle : XLC Non Suspension SP-R30, Dia. 30.9 mm, L: 400 mm

 Rigid · AL 6061 27.2X350MM °Value not published by the brand
Drivetrain–Not given 1×12

Prices

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

Lapierre Prorace 3.9

Lapierre Prorace 3.9

Sunn Exact S1

Sunn Exact S1

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.

  • Prorace 3.9 · Mountain bike rather for smooth ground, very stable, entry-level equipment.
  • Exact S1 · Mountain bike made for very smooth ground, very stable, short gearing, entry-level equipment.
Terrain
Lapierre Prorace 3.9 21%Sunn Exact S1 1%4 bikes · Sunn Exact S11 bike6 bikes6 bikes3 bikes · Lapierre Prorace 3.92 bikes1 bike3 bikes2 bikes2 bikes1 bike2 bikes3 bikes2 bikes2 bikes1 bike4 bikes2 bikes2 bikes2 bikes2 bikes4 bikes2 bikes2 bikes5 bikes4 bikes2 bikes2 bikes5 bikes2 bikes
EasyDemanding
Handling
Lapierre Prorace 3.9 92%Sunn Exact S1 96%4 bikes1 bike2 bikes2 bikes2 bikes2 bikes1 bike7 bikes1 bike2 bikes4 bikes1 bike2 bikes1 bike1 bike1 bike1 bike2 bikes1 bike1 bike5 bikes2 bikes2 bikes2 bikes · Lapierre Prorace 3.94 bikes · Sunn Exact S11 bike
NimbleStable

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 Exact S17 km/h - 34 km/h
Easiest gear (climbing)Hardest gear (descending)
Lapierre Prorace 3.9Sunn Exact S1other cross-country 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
DisciplineSame for all Cross-country
As printed

VTT de cross-country semi-rigide

 Cross-country
Frame and fork
Bottom bracket Shimano PressFit MT800 MTB 92 °Value not published by the brand–Not given
Seatpost diameter 27.2 mm °Value not published by the brand–Not given
Suspension
Fork travelSame for all 100 mm 100 mm
Drivetrain3 differences
Groupset brandSame for all Shimano
As printed

Derailleur Arrière : Shimano Deore RD-M6100-SGS 12s, Shadow+

 Shimano
As printed

SHIMANO DEORE RD-M6100 SHADOW +, 12V

ShiftingSame for all Mechanical
As printed

Levier de vitesse droit : Shimano Triggershift Deore SL-M6100-R, Rapidfire+

 Mechanical
As printed

SHIMANO DEORE SL-M6100 12V

Chainrings–Not given 1
Gears at the backSame for all 12 12
Chainring teeth FC-MT512-1, 2-Piece Crankset
As printed

Pédalier : FC-MT512-1, 2-Piece Crankset

 Shimano FC-MT511-1 32T
Cassette Shimano Deore CS-M6100-12, MICRO SPLINE
As printed

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

 SHIMANO DEORE CS-M6100 12V 10-51T
Rear derailleur Shimano Deore 12s Shadow + °Value not published by the brand SHIMANO DEORE RD-M6100 SHADOW +, 12V °Value not published by the brand
Shifters Shimano Triggershift Deore Rapidfire SL-M6100-IR °Value not published by the brand–Not given
Brakes
BrakesSame for all Hydraulic disc °Value not published by the brand
As printed

Shimano Disque hydraulique

 Hydraulic disc °Value not published by the brand
As printed

Shimano Disque hydraulique

Wheels and tyres2 differences
Wheel sizeSame for all 700c / 29"
As printed

Taile des roues 29

 700c / 29"
RimsSame for all Aluminium °Value not published by the brand Aluminium °Value not published by the brand
Rim inner width 25 mm –Not given
Tyres XLC VT-M20 Summit 57-622
As printed

Pneus : XLC VT-M20 Summit 57-622

 MAXXIS IKON 29X2.20
Tyre width fitted 57 mm 2.2 mm −55 mm
Cockpit and seatpost3 differences
Handlebar Lapierre Flat bar Alloy 6061 Top flat, Ø: 31.8 mm °Value not published by the brand 31.8, 75MM °Value not published by the brand
Stem Lapierre 7050 Alloy, 7°, Ø: 31.8 mm °Value not published by the brand 31.8, 75MM °Value not published by the brand
Seatpost model Lapierre Non Suspension Alloy, Ø: 27.2 mm °Value not published by the brand AL 6061 27.2X350MM °Value not published by the brand

° 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.

Prorace 3.9 · M
  • Prorace 3.9 · M

Stack and reach

570580590600610620630640350360370380390400410420↖ UprightAggressive ↘Reach (mm)Stack (mm)Prorace 3.9 · M — Reach (mm) 390 · Stack (mm) 605Exact S1 · S — Reach (mm) 387 · Stack (mm) 600
  • Prorace 3.9 · M Prorace 3.9 · M — Reach (mm) 390 · Stack (mm) 605
  • Exact S1 · S Exact S1 · S — Reach (mm) 387 · Stack (mm) 600
Geometry11 differences
Size M S
Reach 390 mm 387 mm −3 mm
Stack 605 mm 600 mm −5 mm
Top tube (effective) 575 mm 570 mm −5 mm
Seat tube 430 mm 400 mm −30 mm
Head tube 90 mm 105 mm +15 mm
Head angle 69.5° 69° −0.5°
Seat angleSame for all 73° 73°
Chainstays 428 mm 430 mm +2 mm
Wheelbase 1,121 mm 1,078 mm −43 mm
Front centre 701 mm 653 mm −48 mm
BB drop 65 mm –Not given
BB height 309 mm –Not given
Trail 0 mm 130 mm +130 mm
Standover–Not given 746 mm

Where to buy them

Compare the whole Lapierre Prorace rangeCompare the whole Sunn Exact range

Frequently asked questions

Which is lighter, Lapierre Prorace 3.9 or Sunn Exact S1?

Lapierre Prorace 3.9 weighs 12.9 kg, Sunn Exact S1 14 kg, as their brands give them.

What groupset do Lapierre Prorace 3.9 and Sunn Exact S1 come with?

Lapierre Prorace 3.9: Shimano Deore M6100 12 vitesses. Sunn Exact S1: Shimano Deore.

How do Lapierre Prorace 3.9 and Sunn Exact S1 compare on geometry?

In size M, Lapierre Prorace 3.9 has a stack of 605 mm for a reach of 390 mm; in size S, Sunn Exact S1 has 600 mm for 387 mm. More stack for the reach means a more upright position.

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