Specialized Stumpjumper 15 Alloy Mountain Bike - Satin Cast Blue/Dove Grey - S3

Carve up the mountain, whatever the trail, whoever the rider with the Stumpjumper 15 Alloy Mountai...

Best current price£2,365.00from Cycles U.K.

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Cycles U.K.Specialized 2025 Stumpjumper 15 Alloy Full Suspension Mountain Bike S4 Gloss White Mountains / Dark Moss Green - Cycles UK
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Evans Cycles UKSpecialized Stumpjumper 15 Alloy 2026 Mountain Bike Medium White
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Product Information

Full details

The Specialized Stumpjumper 15 Alloy is designed for trail riders seeking a versatile and high-performing full-suspension mountain bike. Its key benefit is its ability to handle diverse terrains with efficiency and control, thanks to its adjustable geometry and robust components. One caveat is that the bike does not come with pedals. This bike features an M5 Alloy chassis, Shimano Deore drivetrain, RockShox Psylo Silver fork, and Shimano MT-420 4-piston brakes, offering a blend of performance and customization for an enhanced riding experience.

All features

BrandSpecialized

Extended Product Information

FAQs

What is the recommended tire pressure?

Tire pressure depends on your weight, riding style, and terrain. Experiment to find the optimal pressure, typically between 25-40 PSI.

How often should I service the suspension?

Suspension service intervals vary, but it's generally recommended to service the fork and shock annually or every 50-100 hours of riding, depending on use.

Can I use different wheels on the bike?

The bike is designed to use 29" wheels or a mixed wheel setup (27.5" rear). Ensure the hub spacing is compatible.

What kind of pedals should I use?

The bike does not include pedals. You can choose from various types, including flat pedals or clipless pedals, depending on your preference.

How do I adjust the geometry?

The bike has adjustable geometry settings on the head angle and bottom bracket. Use the provided tools and consult the owner's manual for instructions.

What is the weight limit for the bike?

The weight limit for the bike is not explicitly specified in the product data. Contact the manufacturer to confirm.

What is the warranty on the frame?

The warranty includes a lifetime replacement of suspension pivot bearings to the original owner

Troubleshooting

Poor shifting performance.

Check and adjust the derailleur indexing. Ensure the shift cables are properly tensioned and lubricated. Replace worn cables if necessary.

Brakes feel spongy or lack power.

Bleed the brakes to remove air bubbles. Check brake pads for wear and replace them if needed. Inspect brake lines for leaks.

Suspension feels harsh or unresponsive.

Check and adjust the suspension settings (sag, compression, rebound) according to your weight and riding style. Service the suspension regularly.

Creaking noises.

Check and tighten all bolts and connections. Inspect the bottom bracket, headset, and suspension pivots for wear or damage. Lubricate or replace components as needed.

Pros and Cons

Pros

  • Versatile for various trail types and riding styles.
  • Highly customizable geometry for personalized performance.
  • Durable and reliable components for long-lasting use.
  • Integrated storage to carry essential items on rides.
  • Efficient pedaling characteristics and optimal bump force management.

Cons

  • Pedals not included, requiring an additional purchase.
  • May require professional setup for optimal geometry adjustments.
  • Some riders may find the mixed wheel setup less desirable.
  • The number of geometry adjustments can be overwhelming for some riders.
  • The weight of the bike might be higher than some other trail bikes.

Setup, Compatibility & Care

  1. Assembly: The bike requires assembly, which should be performed by a qualified mechanic to ensure proper setup and safety.
  2. Geometry Adjustment: Utilize the adjustable geometry features to fine-tune the bike's handling characteristics. Experiment with the head angle and bottom bracket height to find the optimal setup for your riding style and terrain.
  3. Suspension Setup: Set the sag and damping on the RockShox Psylo Silver fork and X-Fusion 02 Pro RL shock according to your weight and riding style. Consult the owner's manuals for proper settings.
  4. Brake Adjustment: Ensure the Shimano MT-420 brakes are properly adjusted for optimal stopping power and lever feel.
  5. Tire Pressure: Adjust tire pressure based on terrain and riding conditions. Lower pressures provide more grip, while higher pressures reduce rolling resistance.
  6. Cleaning: Regularly clean the bike with mild soap and water, avoiding high-pressure washers. Pay attention to the drivetrain and suspension components.
  7. Lubrication: Lubricate the chain and other moving parts regularly to ensure smooth operation and prevent wear.

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