Extralite Extrabolt 12.1 M5 x 15mm Aluminium Bolt Set (4 pcs)
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$35.00 - Regular price
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$35.00
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Extralite Extrabolt 12.1 M5 x 15 Aluminium Bolt Set (4 pieces)
The Extralite Extrabolt 12.1 is a hyper-accurate, ultra-light M5 x 15mm bolt set designed for non-structural applications where every gram counts — bottle cages, rear derailleur pulleys and GoPro mounts.
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We're happy to arrange a special order just for you!
🚴 Why Choose the Extralite Extrabolt 12.1 Bolt Set?
The Extralite Extrabolt 12.1 is a set of four ultra-light aluminium bolts designed to shave weight where it makes sense.
Extralite has been manufacturing class-leading bicycle components since 1995, and their expertise in precision aluminium machining is evident in every detail of this bolt set. Engineered for precision and minimal mass, and CNC-machined from high-grade AL 7075 T6 aluminium with rolled threads and a hollow stem, each bolt weighs just 0.875g.
The flat “drop” head design allows the bolts to sit flush when used for bottle cage mounts, GoPro holders and rear derailleur pulley wheels. Rolled threads improve strength and thread engagement, while the hollow body removes unnecessary material without compromising fit.
This is not a universal bolt set... and that’s the point. Extralite is very clear: these bolts should only be used in non-safety-critical locations. Used correctly, they’re a smart way to fine-tune a high-end build and remove grams where they won’t bite you later.
If you’re the kind of rider who notices (and cares!) when a build is 30 grams lighter, the Extrabolt 12.1 bolt kit makes sense.
Suitable Applications
- Bottle cage mounts
- Rear derailleur pulley wheels (Shimano-compatible)
- GoPro, computer and accessory mounts
- Non-load-bearing accessories
Not suitable for:
- Stem bolts
- Seatpost clamps
- Brake calipers
- Rotor bolts
- Handlebar clamps
- Any safety-critical fasteners
Features
- Ultra-Lightweight: Just 0.875g per bolt (3.5g per set)
- 7075-T6 Aluminium: High-strength premium-grade alloy
- Hollow Body: Removes excess material while maintaining proper fit
- Rolled Threads: Stronger than cut threads for improved durability and thread engagement
- Flat Head Design: Sits flush in compatible applications
- T20 Torx: Positive tool engagement during installation
- 100% Made in Italy: Precision manufacturing and quality control
Pro Bike Mechanic’s Tip
Always grease the threads and head base area before installation. Start aluminium bolts by hand to avoid cross-threading, then torque to 2.5-3 Nm using a T20 Torx wrench. Check bolt torque after your first ride, then periodically. If you're unsure whether an application is load-bearing, it probably is — when in doubt, don't use aluminium bolts there.
🚀 Ready to Ride?
Fine-tune your build the smart way and shave grams safely. The Extralite Extrabolt 12.1 removes weight where it matters, without compromising safety. In stock at BMCR Gear and shipping Australia-wide.
Technical Details
- Thread: M5 x 15mm
- Head Type: Flat head, T20 Torx
- Material: AL 7075 T6 aluminium
- Construction: CNC-machined, hollow body, rolled threads
- Weight: 0.875g per bolt (3.5g per set)
- Quantity: 4 bolts per set
- Recommended Torque: 2.5-3 Nm (T20 Torx)
- Compatible Uses: Bottle cages, GoPro mounts, derailleur pulleys*
- Available Colours: Blue, Purple, Orange (Note: Other colours available via special order)
- Important Note: Aluminium bolts must not be used in safety-critical applications
FAQs
Frequently Asked Questions
Q: Where can I safely use Extrabolt 12.1 bolts?
A: Bottle cage mounts, GoPro holders and rear derailleur pulley wheels (with compatibility checks). They are not for safety-critical applications.
Q: Can I use these on SRAM Red derailleurs?
A: Not for the upper pulley position on SRAM Red. Always check compatibility before installation.
Q: What's the weight difference compared to standard steel bolts?
A: Standard M5 steel bolts weigh approximately 2-3g each. The Extrabolt 12.1 saves roughly 1-2g per bolt, or 4-8g for a full set of four, leading to meaningful savings in non-structural applications.
Q: Are aluminium bolts safe to use on my bike?
A: Yes, when used only in non safety-critical locations and installed correctly. They should never replace high-load structural fasteners.
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FAQs
What payment methods do you accept?
We accept major credit and debit cards, PayPal, and other secure payment methods at checkout. All payments are processed securely so you can feel confident placing your order.
How long will it take to get my order?
We dispatch orders within 1–2 business days so it's on the way to you a.s.a.p.
Shipping times vary by location. Standard delivery within Australia usually takes 2–6 business days.
Can I track my order?
You sure can! Once your order is on the move, you'll receive a tracking link via email.
Can I return or exchange an item?
Our full refunds and returns policy can be found here.
Do you ship internationally?
We only ship within Australia. (Sorry.)
How do I know if a component is compatible with my bike?
Each product page includes compatibility info, but if you’re unsure, feel free to contact us. We’re bike mechanics, and we’re happy to help!
Do you install components or offer servicing?
This webshop is focused on online retail. If you're in Adelaide, however, we run a separate workshop (Bio-Mechanics Cycles & Repairs). You're welcome to book in via that site to get components installed or your bike serviced.