Description

Bolt Kit – No 25: Essential OEM Spare Parts Guide for BMC Trailfox TF01, TF02 & TF03 Mountain Bike Suspension Maintenance

Mountain bike enthusiasts who own a BMC Trailfox full-suspension rig know that proper rear linkage hardware is critical for smooth performance, safety, and longevity. One of the most important replacement components in this category is the Bolt Kit – No 25. This official BMC spare parts kit keeps your bike’s rear suspension linkage operating exactly as the Swiss engineers designed it.

BMC Trailfox TF01 with Shimano XTR Di2 – Velomotion

Whether you’re a weekend warrior ripping singletrack or a serious enduro rider pushing your Trailfox to the limit, worn or damaged linkage bolts can cause play, noise, reduced suspension efficiency, and even safety issues. Replacing them with the genuine Bolt Kit – No 25 restores factory-spec performance and gives you peace of mind on every descent.

In this comprehensive guide, we’ll cover everything you need to know about the Bolt Kit – No 25 — from exact compatibility and specifications to installation tips, maintenance advice, and where to buy it. If you ride a BMC Trailfox TF01, TF02, or TF03, this post is your complete resource.

What Exactly Is the Bolt Kit – No 25?

The Bolt Kit – No 25 (official SKU 301184) is a precision-engineered rear suspension linkage hardware replacement kit produced by BMC Switzerland specifically for their popular Trailfox series of full-suspension mountain bikes.

Bolt Kit – No 25 – BMC Switzerland AG

Unlike generic aftermarket bolts that may not match thread pitch, length, or material strength, this OEM kit delivers factory tolerances. It includes three precision-machined long linkage bolts paired with matching sealed bearings. The complete kit weighs approximately 165 grams and uses high-strength alloy steel for the bolts plus premium sealed bearings that resist contamination and provide silky-smooth pivot action.

Retailers and BMC documentation confirm this kit is the direct replacement for the rear suspension linkage bolts on the Trailfox platform. It ensures secure fastening, eliminates unwanted play, and maintains the progressive suspension kinematics that make the Trailfox such a capable all-mountain and enduro machine.

Compatible BMC Trailfox Models

The Bolt Kit – No 25 is officially compatible with these legendary BMC full-suspension mountain bikes:

• BMC Trailfox TF01 (including 2018 and earlier versions)
• BMC Trailfox TF02
• BMC Trailfox TF03

These models share the same rear suspension linkage design that relies on this specific hardware set. If your frame has the distinctive Trailfox four-bar linkage with a rockered shock mount, this kit is the correct choice. Many riders upgrading from older 2016–2020 Trailfox models report that installing the Bolt Kit – No 25 immediately removes creaking and restores the plush yet supportive feel the bike is famous for.

BMC trailfox TF01 All Mountain Full Suspension user reviews : 5 out of 5 – 1 reviews – mtbr.com

Key Features and Benefits of the Bolt Kit – No 25

Why choose the genuine BMC Bolt Kit – No 25 over cheaper alternatives? Here are the standout advantages:

• Precision-machined long bolts — Exact thread length and diameter for perfect fit without binding or looseness.
• Sealed bearings included — Pre-greased and protected against dirt and water ingress common on mountain bike trails.
• High-strength alloy steel construction — Rated for the extreme loads of aggressive riding while remaining lightweight at just 165 g total.
• Factory-matched tolerances — Maintains BMC’s engineered suspension kinematics and prevents premature wear on frame pivots.
• Easy drop-in replacement — Designed for straightforward service by home mechanics or professional shops.
• Peace of mind — Backed by BMC’s quality standards and warranty considerations when used on eligible frames.

Riders often notice improved suspension sensitivity, reduced noise, and better overall bike feel after swapping in this kit. It’s a small investment that dramatically extends the life of your high-end Trailfox frame.

Technical Specifications at a Glance

• Product Name: Bolt Kit – No 25
• SKU: 301184 (also referenced as BMC-18-10801-061)
• Weight: 165 g
• Contents: 3 long linkage bolts + matching sealed bearings
• Material: High-strength alloy steel bolts with precision bearings
• Model Year Compatibility: Primarily 2018 Trailfox series (TF01/TF02/TF03)
• Application: Rear suspension linkage pivots
• Price: Approximately $115–$119 USD (depending on retailer and currency)

These specs make the Bolt Kit – No 25 one of the most targeted and reliable spare parts in the BMC lineup.

Bearing Swap – 2020 Santa Cruz Tallboy (4th Gen)

Step-by-Step Installation Guide for the Bolt Kit – No 25

While every bike is slightly different, here’s a general professional-level process for replacing rear linkage hardware. Always consult your specific BMC service manual or a certified dealer for torque specs and safety.

1. Prepare your workspace — Clean bike, torque wrench, Allen keys, and grease. Support the frame securely.
2. Remove old hardware — Carefully extract the existing linkage bolts and bearings. Note orientation.
3. Clean pivots — Remove old grease and debris from frame bores.
4. Install new bearings — Press the new sealed bearings into place (use proper tools to avoid damage).
5. Insert new long bolts — Slide the three bolts from the Bolt Kit – No 25 through the linkage arms and pivots.
6. Torque to spec — Follow BMC recommendations (typically 10–15 Nm for these pivots — confirm with manual).
7. Check for smooth operation — Cycle the suspension and ensure no binding or play.

Many shops offer full assembly service with anti-theft marking for added security. If you’re not comfortable with suspension work, take it to a BMC-certified technician — proper installation is key to safety and performance.

First Ride: LJB Suspension – All of the Pivots – Pinkbike

Maintenance Tips to Maximize Your Bolt Kit – No 25

Once installed, keep your new hardware performing optimally:

• Inspect linkage bolts every 50–100 riding hours or after wet/muddy rides.
• Re-grease pivots annually or as recommended by BMC.
• Avoid high-pressure washes directly on bearings.
• Store your bike indoors to reduce corrosion risk.
• Combine with regular shock servicing for best results.

Following these habits can make your Bolt Kit – No 25 last for thousands of miles of hard riding.

Why Original BMC Parts Matter More Than Ever

Using aftermarket or generic bolts might seem cheaper upfront, but they often introduce play, accelerate frame wear, or fail under load. The genuine Bolt Kit – No 25 guarantees:

• Perfect thread engagement
• Matched material expansion rates
• Factory-tested durability
• Full compatibility with BMC warranty programs

For owners who’ve invested in a premium Trailfox, protecting that investment with official spare parts is simply smart riding.

Where to Buy the Bolt Kit – No 25

You can purchase the Bolt Kit – No 25 directly from:

• Official BMC website (us.bmc-switzerland.com or regional sites)
• Authorized BMC dealers and premium bike shops
• Select online retailers specializing in high-end MTB parts

Check stock carefully — this kit is popular and sometimes shows low inventory. Authorized dealers often provide installation services and can verify compatibility with your exact frame serial number.

Frequently Asked Questions About Bolt Kit – No 25

Q: Is this kit only for older Trailfox models? A: It was designed for the TF01/TF02/TF03 generation but remains the correct replacement for any compatible linkage on those frames.

Q: Does it include bearings or just bolts? A: The kit contains both the three long bolts and the matching sealed bearings.

Q: Can I install it myself? A: Experienced home mechanics can, but professional installation is recommended for first-timers to ensure correct torque and safety.

Q: How often should I replace linkage bolts? A: Every 1–2 years or 2000–3000 km of aggressive riding, or sooner if you notice creaking or play.

Q: Will this fix suspension noise? A: In most cases, yes — worn linkage hardware is a common cause of creaks on full-suspension bikes.

Final Thoughts: Keep Your Trailfox Riding Like New

The Bolt Kit – No 25 may be a small component, but it plays an outsized role in the performance and enjoyment of your BMC Trailfox mountain bike. By choosing this genuine spare part, you’re investing in reliability, safety, and the signature ride quality that BMC is renowned for worldwide.

Whether you’re refreshing an older Trailfox or performing routine maintenance, don’t compromise on quality. Grab your Bolt Kit – No 25 today and get back to the trails with confidence.

Ride safe, ride strong, and keep those pivots silent and smooth! If you have questions about compatibility or installation for your specific BMC Trailfox, drop a comment below or contact your local authorized dealer.

Ready to order your Bolt Kit – No 25? Head to the official BMC spare parts section or your favorite premium bike retailer and keep your full-suspension rig performing at its absolute best.