Runometry is growing: bikes are here, catalogue under construction, always at the best price.

Skip to content

BH Gravelx Evo 3.5 R GRX Hydra vs Bombtrack Hook Ext C Apex AXS

BH Gravelx Evo 3.5 R GRX Hydra, side view

BH

Gravelx Evo 3.5 R GRX Hydra

Bombtrack Hook Ext C Apex AXS, side view

Bombtrack

Hook Ext C Apex AXS

Mid-rangeRaceCarbon700c2026
High endCarbon700c2025

Close on the specs and the list price: here are their 16 differences, line by line.

BH Gravelx Evo 3.5 R GRX Hydra, side viewBHBH Gravelx Evo 3.5 R GRX Hydra
List price £2,727
Bombtrack Hook Ext C Apex AXS, side viewBombtrackBombtrack Hook Ext C Apex AXS

At a glance

  • BH Gravelx Evo 3.5 R GRX Hydra has the higher-range groupset: Shimano GRX 820, against SRAM Apex AXS.
  • BH Gravelx Evo 3.5 R GRX Hydra is the newer model (2026).
Key specs5 differences
List price £2,727 –Not given
Model year 2026 2025
FrameSame for all Carbon
As printed

Gravel X Carbon Monocoque Racing

 Carbon
As printed

Toray T800 carbon blend

Wheelset 700c · Shimano RS171 Disc 700c · Seido Sinus i21, tubeless ready, 32H
DrivetrainSame for all 1×12 1×12
Groupset Shimano GRX 820 Higher range SRAM Apex AXS
As printed

SRAM Apex AXS 1x, 12-speed

Brake model Shimano GRX 610 Higher range SRAM Apex flat mount hydraulic disc
As printed

Sram Apex flat mount hydraulic disc brakes

Seatpost Rigid · BH Gravel X °Value not published by the brand Rigid · Seido Yew aluminium seatpost, 27.2 mm x 350 mm °Value not published by the brand
Weight–Not given 9.9 kg
Fork model–Not given Seido MGV full carbon

Prices

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

BH Gravelx Evo 3.5 R GRX Hydra

BH Gravelx Evo 3.5 R GRX Hydra

Bombtrack Hook Ext C Apex AXS

Bombtrack Hook Ext C Apex AXS

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.

  • Gravelx Evo 3.5 R GRX Hydra · Gravel bike very demanding, average equipment, equipment for the price better than 99% of other race gravel bikes.
  • Hook Ext C Apex AXS · Gravel bike all-round, neutral handling, rather high equipment.
Terrain
BH Gravelx Evo 3.5 R GRX Hydra 88%Bombtrack Hook Ext C Apex AXS 43%5 bikes1 bike · Bombtrack Hook Ext C Apex AXS1 bike3 bikes · BH Gravelx Evo 3.5 R GRX Hydra
EasyDemanding

Equipment level

0255075100£3,000£4,000£5,000£6,000£7,000List priceEquipment score
  • BH Gravelx Evo 2.5 R GRX
  • BH Gravelx Evo 4.5 R Apex AXS
  • BH Gravelx Evo 5.5 R GRX 820
  • Merida Mission 10k Xplr AXS
  • Merida Mission Force Xplr AXS
  • Merida Mission Grx400
  • Merida Mission Grx825 Di2
  • Merida Mission Rival Xplr AXS
  • BH Gravelx Evo 3.5 R GRX Hydra
  • Gravelx Evo 3.5 R GRX HydraEquipment level 59/100 · Mid-range
  • Hook Ext C Apex AXSEquipment level 67/100 · High end
BH Gravelx Evo 3.5 R GRX HydraBombtrack Hook Ext C Apex AXSother race gravel bikes

Components and specs

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

Ride type
Ride type Race
As printed

Gravel X Carbon Monocoque Racing

–Not given
SuspensionSame for all Rigid °Value not published by the brand Rigid °Value not published by the brand
Frame and fork1 difference
ForkSame for all Carbon °Value not published by the brand Carbon
As printed

Seido MGV full carbon

Frame weight 940 g Best of the comparison 1,380 g +440 g
Max tyre clearanceSame for all 45 mm 45 mm
Axles–Not given Thru-axles
As printed

12 x 100 mm front and 12 x 142 mm rear through axles

Bottom bracket–Not given SRAM DUB T47 85.5 mm
Cable routing–Not given Internal °Value not published by the brand
As printed

internal hub dynamo cable routing

Seatpost diameter–Not given 27.2 mm
Drivetrain6 differences
Groupset brand Shimano
As printed

Shimano GRX 820

 SRAM
As printed

SRAM Apex AXS 1x

Shifting Mechanical °Value not published by the brand
As printed

Shimano GRX 820 12sp Shimano GRX hydra

 Electronic, wireless °Value not published by the brand
As printed

SRAM X1 Eagle AXS, clutch, long cage SRAM Apex AXS double tap 1 x 12

ChainringsSame for all 1 1
Gears at the backSame for all 12 12
Chainring teeth Shimano GRX 820 Mono 40T Higher range SRAM Apex Wide, DUB spindle
Cassette Shimano SLX 10/45 Higher range SRAM NX Eagle PG-1230 12-speed, 11-50 T
Rear derailleur Shimano GRX 820 12sp °Value not published by the brand SRAM X1 Eagle AXS, clutch, long cage °Value not published by the brand
Shifters Shimano GRX hydra °Value not published by the brand SRAM Apex AXS double tap 1 x 12 °Value not published by the brand
Brakes
BrakesSame for all Hydraulic disc °Value not published by the brand
As printed

Shimano GRX 600 Disque hydraulique

 Hydraulic disc
As printed

Sram Apex flat mount hydraulic disc brakes

Front rotor–Not given 180 mm
Rear rotor–Not given 160 mm
Wheels and tyres1 difference
Wheel sizeSame for all 700c / 29"
As printed

Pirelli Cinturato Gravel 700x40

 700c / 29"
As printed

WTB Venture TCS Light 40-622

RimsSame for all Aluminium °Value not published by the brand Aluminium °Value not published by the brand
Tubeless ready–Not given yes
Tyres Pirelli Cinturato Gravel 700x40 WTB Venture TCS Light 40-622, tubeless ready
Tyre width fittedSame for all 40 mm 40 mm
Cockpit and seatpost3 differences
Handlebar width 400 mm °Value not published by the brand–Not given
Handlebar FSA NS Gravel, X, Handlebar, FSA NS Gravel, XS 400mm, SM 420mm, MD 420mm, LA 440mm, XL 440mm °Value not published by the brand Seido Tackle drop bar, 31.8 mm, 16° flare °Value not published by the brand
Stem FSA NS SMR, X, Stem, FSA NS SMR, XS 90mm, SM 100mm, MD 100mm, LA 110mm, XL 110mm °Value not published by the brand Seido Scatter forged aluminium stem, -7° °Value not published by the brand
Seatpost model BH Gravel X °Value not published by the brand Seido Yew aluminium seatpost, 27.2 mm x 350 mm °Value not published by the brand
Weight
Weighed in size–Not given M
As printed

9.9 kg (size M)

Max total weight–Not given 115 kg
Mounts and storage
Rack mounts–Not given yes
Mudguard mounts–Not given yes

° 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.

Gravelx Evo 3.5 R GRX Hydra · XSHook Ext C Apex AXS · S
  • Gravelx Evo 3.5 R GRX Hydra · XS
  • Hook Ext C Apex AXS · S

Stack and reach

500510520530540550560570580340350360370380390400410↖ UprightAggressive ↘Reach (mm)Stack (mm)Gravelx Evo 3.5 R GRX Hydra · XS — Reach (mm) 366 · Stack (mm) 510Hook Ext C Apex AXS · S — Reach (mm) 384 · Stack (mm) 564
  • Gravelx Evo 3.5 R GRX Hydra · XS Gravelx Evo 3.5 R GRX Hydra · XS — Reach (mm) 366 · Stack (mm) 510
  • Hook Ext C Apex AXS · S Hook Ext C Apex AXS · S — Reach (mm) 384 · Stack (mm) 564
Geometry15 differences
Size XS S
Reach 366 mm 384 mm +18 mm
Stack 510 mm 564 mm +54 mm
Top tube (effective) 503 mm 541 mm +38 mm
Seat tube 478 mm 500 mm +22 mm
Head tube 100 mm 130 mm +30 mm
Head angle 69.5° 70.5° +1°
Seat angle 75° 74.5° −0.5°
Chainstays 426 mm 425 mm −1 mm
Wheelbase 1,000 mm 1,034 mm +34 mm
Front centre 584 mm 619 mm +35 mm
BB drop 67 mm 72 mm +5 mm
BB height 282 mm 277 mm −5 mm
Fork offset 45 mm 53 mm +8 mm
Trail 82 mm 69 mm −13 mm
Standover–Not given 773 mm

Where to buy them

Compare the whole BH Gravelx rangeCompare the whole Bombtrack Hook range

Frequently asked questions

What groupset do BH Gravelx Evo 3.5 R GRX Hydra and Bombtrack Hook Ext C Apex AXS come with?

BH Gravelx Evo 3.5 R GRX Hydra: Shimano GRX 820. Bombtrack Hook Ext C Apex AXS: SRAM Apex AXS.

How do BH Gravelx Evo 3.5 R GRX Hydra and Bombtrack Hook Ext C Apex AXS compare on geometry?

In size XS, BH Gravelx Evo 3.5 R GRX Hydra has a stack of 510 mm for a reach of 366 mm; in size S, Bombtrack Hook Ext C Apex AXS has 564 mm for 384 mm. More stack for the reach means a more upright position.

Other comparisons

Compare other models