How to Choose Mountain Bikes
Rocky Mountain Growler 40 Mountain Bike
$1,549.00
Members get an est. $154.90 in rewards
Bringing modern touches to a classic hardtail profile, the Rocky Mountain Growler 40 mountain bike's aggressive ride character delivers confidence while descending or ripping tough trails.
Key Details
Wheel Size
29 inches
Fork Travel
140 millimeters
Number of Gears
12 gear(s)
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- A refreshingly simple and tough package for rowdy days at the trails
- FORM™ tubesets use premium materials to meet strict requirements
- Each FORM tube is engineered for its specific purpose within the frame, ensuring optimized strength, weight and ride quality
- 29 in. wheel size
- NOTE: Specs and images are subject to change based on component availability
Imported.
This bike comes with Coast to Coast Support, which includes:
New bikes go through a normal break-in period, after which they should be readjusted. All bicycles sold at REI include free adjustments for one year after purchase date—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation and chain lubrication. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.
View all Rocky Mountain Hardtail Mountain Bikes- 1 year of free adjustments (see more below)
- In-store bike assembly
- Pickup in store or curbside
- Bike experts available at 170+ bike shops
- 20% off shop services
- Free tubes with purchase of flat tire repair (Co-op Cycles brand tubes only; tube must be installed at time of purchase)
New bikes go through a normal break-in period, after which they should be readjusted. All bicycles sold at REI include free adjustments for one year after purchase date—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation and chain lubrication. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.
| Best Use | Mountain Biking |
|---|---|
| Frame | Rocky Mountain 6061 alloy |
| Step-Through | No |
| Mountain Bike Style | Trail |
| Bike Suspension | Front Suspension |
| Fork | Suntour Raidon 34 LOR Air Boost 140 mm |
| Fork Travel | 140 millimeters |
| Crankset | Shimano Deore; 30T; 24 mm spindle; crank length for S & M: 170 mm; crank length for L & XL: 175 mm |
| Bottom Bracket | Shimano SM-BB52 |
| Shifters | Shimano Deore 12-speed |
| Rear Derailleur | Shimano Deore 12-speed |
| Rear Cogs | Shimano Deore 10-51T 12-speed |
| Number of Gears | 12 gear(s) |
| Brake Type | Hydraulic Disc Brake |
| Brakes | Shimano MT4100 2 piston, resin pads |
| Brake Levers | Shimano MT4100 2 piston, resin pads |
| Rims | WTB ST i30 TCS 2.0 Tubeless; 32H; tubeless compatible (tape/valves/sealant not included) |
| Front Hub | Shimano MT410, 15 mm boost |
| Rear Hub | Shimano MT410 boost 148 mm |
| Wheel Size | 29 inches |
| Tires | Front: Maxxis Minion DHF 2.6 EXO Tubeless Ready; rear: Maxxis Minion DHR II 2.6 EXO Tubeless Ready |
| Tire Width | 2.6 inches |
| Handlebar Shape | Flat Bar |
| Handlebar | Rocky Mountain AM; 800 mm width; 25 mm rise; 9 deg. backsweep; 5 deg. upsweep; 31.8 clamp |
| Stem | Rocky Mountain 31.8 XC; 7 deg. rise; all sizes: 40 mm |
| Seat Post | X-Fusion Manic alloy 30.9 mm; XS & S: 125 mm; M: 150 mm; L & XL: 170 mm |
| Dropper Post | Yes |
| Saddle | Rocky Mountain 148 steel |
| Pedals | Alloy platform |
| Headset | Rocky Mountain ZS44; 56; loose ball bearings; 1-1/2 in. Crown Race |
| Chain | Shimano M6100 |
| Weight | 31 lbs. 8 oz. |
| Bike Weight | Bike weight is based on median size, as sold, or the average of two median sizes. |
| Gender | Unisex |
Rocky Mountain Bikes (245867)
| S | M | L | XL | |
|---|---|---|---|---|
| Height Range | 5’2” - 5’7” | 5’6” - 5’10” | 5’9” - 6’2” | 6’1” - 6’6” |
| Reach | 425 | 450 | 475 | 500 |
| Stack | 630 | 634 | 643 | 652 |
| Effective Top Tube | 593 | 620 | 647 | 675 |
| Seat Tube Center-Top | 380 | 420 | 445 | 480 |
| Standover Height | 779 | 802 | 804 | 818 |
| Head Tube Length | 95 | 100 | 110 | 120 |
| Head Tube Angle (degrees) | 64 | 64 | 64 | 64 |
| Seat Tube Angle (degrees) | 75 | 75 | 75 | 75 |
| Wheelbase | 1183 | 1210 | 1239 | 1269 |
Sizing Notes
Measurements are stated in millimeters unless otherwise indicated.
How we measure bikes
- Standover Height Standover Height is a measurement from the ground to the top of the top tube, measured at the midpoint of the top tube.
- Reach Reach is the horizontal distance from the center of the cranks to the center of the head tube, measured at head tube level.
- Stack Stack is the vertical distance from the center of the cranks to the center of the head tube, measured to the top of the head tube.
- Effective Top Tube Effective top tube is the distance from the center of the head tube to the center of the seat tube/seat post, measured parallel to the ground.
- Seat Tube Center to Top Seat Tube length is the measurement of the seat tube, from the center of the cranks to the top of the seat tube.
- Head Tube Length Head Tube Length is measured from the bottom to the top of the head tube.
- Head Tube Angle Head Tube Angle is the acute angle between the head tube and the ground (measured towards the rear of the bike)
- Seat Tube Angle Seat Tube Angle is the acute angle between the seat tube and the ground (measured towards the rear of the bike).
- Bottom Bracket Height Bottom Bracket Height is a measurement taken vertically from the ground up to the center of the cranks.
- Wheelbase Wheelbase is the measurement from the center of the front axle to the center of the rear axle.
- Chainstay Length Chainstay Length is the measurement from the center of the cranks to the center of the rear axle.
- Fork Offset Fork Offset, or rake, is the distance from the front axle to a line drawn parallel to the center of the head tube or steering axis.
