Rocky Mountain

* Information provided in this AI Shopping Assistant may not match all information on the website. Please refer to the website to confirm details.

Rocky Mountain

Rocky Mountain Reaper 20 2026 Bike

(0)
Item #: BI005611
$2,699.00

Most orders ship free over $50*

Authorized Rocky Mountain Retailer

Insider - Exclusive Coupons and more.

Close

Double-check!

Confirm your options before continuing

Color: Red/Blue
MFG #: B0501OS1
Red/Blue
Size:One Size
Only 1 Left - Ready to Ship
More of these are on the way. Leave us your contact information and we'll let you know when they arrive.
There seems to be a problem with your name - Please Provide a name.
There seems to be a problem with your name - Please provide your first and last name.
There seems to be a problem with your phone number - please correct and submit again
There seems to be a problem with your email - please correct and submit again
There seems to be a problem with your email or phone number - Please provide your email or phone number.
Success! You're on our notification list. Thanks for your interest in this product.
Learn More
+ Add Accident Protection from
Remove Protection Plan
Gear Advisor

Questions about this bike?

Contact a Gear Advisor Pro.

*Free Shipping over $50

90-Day Returns

Insider - Exclusive Coupons and more.

Price Protection

Marin Bear Valley 24 Bike 2025

Ready to shred.

The Marin Bear Valley 24 is a focused kids' trail bike built to put young riders on real trails with real bike performance. A lightweight Series 2 aluminum frame with proper MTB geometry, Series 2 aluminum fork, MicroSHIFT Acolyte 1x8 drivetrain with clutch rear derailleur, and Tektro hydraulic disc brakes with kid-specific short-reach levers make this a genuinely capable trail machine. Kid-specific components throughout — from the 580mm handlebar and 130mm cranks to the thin-diameter grips — keep everything proportional and confidence-inspiring for growing riders.

Features

  • Lightweight Series 2 aluminum frame with low standover, proper MTB geometry, replaceable derailleur hanger, and 24" wheels — built for real trails, not just the neighborhood
  • MicroSHIFT Acolyte 1x8 drivetrain with clutch rear derailleur — wide-range 12-42T cassette and clutch mechanism for chain retention on technical terrain
  • Tektro HD-J285 kids' hydraulic disc brakes with short-reach kid-specific levers — real stopping power scaled for smaller hands
  • Kid-specific components throughout — 580mm handlebar, 50mm rise, 130mm cranks with ring guard, thin-diameter grips, and integrated saddle/seatpost sized for young riders
SPECIFICATIONS
Frame Series 2 Lightweight Aluminum MTB, Low Standover, 24" Wheels, Replaceable Derailleur Hanger, Disc Brake
Fork Series 2 Aluminum MTB, Disc Brake
Headset Threadless
Front Derailleur N/A
Rear Derailleur MicroSHIFT Acolyte, 8-Speed, Clutch
Shifters MicroSHIFT Acolyte, Short-Reach, 8-Speed
Crankset Forged Alloy, 30T, 130mm, Ring Guard
Bottom Bracket Sealed Cartridge Bearings, Square Taper
Chain KMC, 8-Speed
Cassette MicroSHIFT Acolyte, 12-42T, 8-Speed
Brakes Tektro HD-J285 Kids' Specific Hydraulic Disc (Front and Rear)
Wheelset Aluminum Double Wall Rims, 28H
Front Hub Forged Aluminum Alloy, 28H
Rear Hub Forged Aluminum Alloy, 28H
Spokes 14g Stainless Steel
Tires MTB, 24x2.25"
Handlebar Marin Riser, 50mm Rise, 580mm Width, 19mm OD Grip Section
Stem Alloy, 40mm
Grips Single Density, Thin Diameter
Seatpost Aluminum, 27.2mm, Integrated Saddle/Post
Saddle Marin Integrated Saddle/Post
Pedals Kids' Specific Nylon Platform
Intended Use Youth Trail

Note: Components are subject to change without notice.

Geo Chart Image

 

Marin Bear Valley 24
Size One
A: Seat Tube Length 310
B: Effective Top Tube 475
C: Stack 461
D: Reach 351
F: BB Drop 45
G: Head Tube Length 105
H: Head Tube Angle 67 °
I: Seat Tube Angle 68 °
J: Standover Height 600
K: Chainstay Length 410
L: Wheelbase 981
Stem Length 40 mm
Handlebar Width 580 mm
Crank Arm Length 152 mm
Marin Bear Valley 24
Size One
A: Seat Tube Length 12.2
B: Effective Top Tube 18.7
C: Stack 18.1
D: Reach 13.8
F: BB Drop 1.8
G: Head Tube Length 4.1
H: Head Tube Angle 67 °
I: Seat Tube Angle 68 °
J: Standover Height 23.6
K: Chainstay Length 16.1
L: Wheelbase 38.6
Stem Length 40 mm
Handlebar Width 580 mm
Crank Arm Length 152 mm

CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals including (Cadmium, Phthalates, Bisphenol, Nickel (Metallic), di(2-ethylhexyl)phthalate "DEHP") Lead, which is known to the State of California to cause cancer and/or cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.

Q & A

Most items SHIP SAME DAY if ordered by 3pm PST and FREE SHIPPING on orders over $50.  Please note that oversize charges may still apply on some heavy or large items and free shipping does not apply to PO Boxes.

1-day free standard Shipping on most orders to California, 2-day free standard Shipping on most orders to Nevada, Arizona, & Utah.  Other states can expect delivery within 3 to 5 days.

Jenson USA ships worldwide, including APO/FPO addresses. For a more specific shipping quote and transit time estimate, simply add the items you are interested into your shopping cart and look for the "Shipping Options" box at the top of the cart page. You don't have to login or create an account to see shipping charges and time in transit estimates.

Bike Shipping: Most complete bikes ship for a $99 oversize shipping fee, unless otherwise noted. Free shipping thresholds do not apply to complete bikes.

Some manufacturers restrict where we can ship their products. If this item has shipping restrictions, they are listed below. If you'd like to buy an item that we cannot ship to your address, we can accept your foreign credit card and ship it to a US address for you.

 

Due to manufacturer restrictions, this product cannot be shipped to the following locations:
  • Canada
Trustpilot

Want To Know More About This Bike?

Availability? Specifications? Sizing?
Leave your contact information below and one of our Gear Advisors will be in touch.
ADD TO CART