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AskMarin Bear Valley 20 2025 (black)
Bear Valley 20 is ready for a proper ride!
Built on a lightweight aluminium frame with true MTB geometry, an aluminium Series 1 fork, fast and grippy tyres, a MicroSHIFT Acolyte 1x8 drivetrain with a wide gear range and a clutch derailleur, Tektro hydraulic disc brakes with levers adapted to childrens hands, and completed with a range of Marin kids components.
The Bear Valley is truly one of the most refined and best-thought-out kids bikes in our range.
Geometry
| ONE SIZE | |
|---|---|
| A Stack | 401 |
| B Reach | 307 |
| C Head tube angle | 67° |
| D Head tube length | 100 |
| E Seat tube angle | 75° |
| F Seat tube length | |
| G Effective top tube | |
| H BB height | 240 |
| I BB drop | 30 |
| J Chainstay | 375 |
| K Wheelbase | 892 |
| L Standover height | |
| M Fork offset | 40 |
| Seatpost diameter | 27.2 |
| Handlebar width | 580 |
| Stem length | 60 |
| Crank length | 130 |
All lengths in millimetres
Technology
1X WIDE-RANGE DRIVETRAINS
Modern 1x drivetrains, with a kid-specific shifter, give the rider the benefits of shifting simplicity and chain retention.
Kid-specific controls
Tektro hydraulic disc brakes with kid-specific close-reach levers and 19 mm grips for little hands
Modern trail geometry
A slack head tube angle paired with a steep seat tube angle creates a ride that will fly uphill yet descend like its on rails. The balanced rider position puts the riders weight between the wheels for steady climbing and handling on the flats, while the slack front end helps add high-speed stability through turns and rough patches.
Additional information
 |  |  |
| frame: | Series 2 Lightweight Aluminum MTB, Low Standover 20 Wheels, Replaceable Deraille |
| pedals: | Kids Specific Nylon Pedal |
| front wheel / hub: | Forged Aluminum Alloy, 28H / Marin, Double Wall Alloy |
| rear wheel / hub: | Forged Aluminum Alloy, 28H / Marin, Double Wall Alloy |
| tires: | Kenda, Booster, 20x2.4 Wire Bead |
| front derailleur: | Hydraulic Kid's Specific Short Reach Alloy Lever |
| rear derailleur: | MicroSHIFT Acolyte, 8-Speed, Super Short Cage, Clutch |
| saddle: | Marin 24 Integrated Saddle/Post |
| chain: | KMC 8-speed |
| fork: | Series 2 Aluminum MTB, Disc Brake A |
| brakes: | Tektro HD-J285 Kid's Specific Hydraulic Disc / Tektro HD-J285 Kid's Specific Hyd |
| shifters: | MicroSHIFT Acolyte, Short-Reach, 8-Speed |
| cranks: | Forged Alloy, 30T, 115mm, Ring Guard / Sealed Cartridge Bearings, Square Taper |
| cassette: | MicroSHIFT Acolyte, 8-Speed, 11-38T |
| EAN: | 0843346134929 |
| seatpost: | Aluminum, 27.2mm, Integrated Saddle/Post |
| model year: | 2025 |
