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18mm Grass Spikes – Maximum Grip for Elite Grass Sprinting
From $13.99
Our 18mm Grass Spikes are the longest replacement spikes in our range, developed for elite sprinters competing on exceptionally soft natural grass surfaces. Offering even greater penetration than our 15mm Grass Spikes, they deliver the ultimate in traction, helping athletes generate maximum force with every stride.
Designed for professional grass sprint racing, including events such as the Stawell Gift, these spikes are best suited to soft, damp or heavily worn tracks where conventional spike lengths simply don’t provide enough purchase. When conditions demand the most aggressive setup possible, 18mm spikes give you the confidence to attack every step.
Pairs well with
Our 18mm Grass Spikes are the longest replacement spikes in our range, developed for elite sprinters competing on exceptionally soft natural grass surfaces. Offering even greater penetration than our 15mm Grass Spikes, they deliver the ultimate in traction, helping athletes generate maximum force with every stride.
Designed for professional grass sprint racing, including events such as the Stawell Gift, these spikes are best suited to soft, damp or heavily worn tracks where conventional spike lengths simply don’t provide enough purchase. When conditions demand the most aggressive setup possible, 18mm spikes give you the confidence to attack every step.
The long pyramid-style conical tip penetrates deep into the surface, reducing slippage during acceleration while maximising grip through ground contact. Whether launching from the blocks or driving through the finish, these spikes are engineered for athletes chasing every possible performance advantage.
Manufactured from quenched and tempered steel, these replacement spikes combine exceptional strength with long-lasting durability. They install easily using any standard spike key and are compatible with all major athletics spike brands, including Nike, Adidas, Asics, Puma and New Balance.
Features
- Designed for elite sprinters competing on natural grass tracks
- Perfect for exceptionally soft or wet grass conditions
- Extra-long 18mm length for maximum penetration and traction
- Conical pyramid profile for outstanding grip and acceleration
- Manufactured from hardened, quenched and tempered steel
- Compatible with all standard athletics spike shoes
- Pack of 12 for $13.99
- Fast & free Australia-wide shipping via Australia Post
- Upgrade to Express Post for $9.99
Not sure if 18mm spikes are right for your event? Take our 30-second Spike Finder Quiz and we’ll recommend the best spike length for your surface, event and conditions.
Frequently Asked Questions
Will these spikes fit my shoes?
All replacement spikes sold on Spikes.au have a universal thread used in all modern athletics spike shoes. That means they will fit all spike shoes from major brands including Nike, Adidas, ASICS, Puma, New Balance, On and Saucony.
If your shoes originally came with removable metal spikes, these replacements will fit.
What spike length should I choose?
For most athletes competing on synthetic athletics tracks, 6mm spikes are the standard and are accepted at almost all venues.
For other surfaces:
• 9mm spikes are commonly used for cross country
• 12mm spikes are typically used for grass surfaces or very soft ground
If you're unsure, complete our >3-question Spike Recommendation Quiz for personalised advice.
Do I need a spike key?
Yes. A spike key (also called a spike wrench) is used to remove old spikes and securely tighten new ones into your shoes.
Most spike shoes include a spike key when purchased, but they can easily be lost over time.
If you don’t already have one, we recommend adding a spike key to your order so you can quickly and easily install your new spikes.
How long will it take for spikes to arrive?
We ship every business day from Melbourne.
Express delivery via Australia Post typically arrives within 2–3 business days, depending on your location.
Regular delivery (untracked) usually takes around 5–7 business days.
If you need spikes urgently for a race or competition, we recommend selecting Express Delivery at checkout.
I need spikes this weekend. Can I pick them up from you?
Spikes.au operates exclusively online, so we’re unable to offer in-person pickup. All orders are shipped via post.
If you need spikes urgently, some specialist running stores in Australia stock selected Spikes.au products. Contact us and we can provide a list of current stockists who may be able to help.
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