Estimated reading time: 12 minutes
Table of Contents
- What Is the Castiron Grip N23?
- Full Specifications
- Moderate-Aggressive Downturn — The Edging Advantage
- Dual Velcro Closure System
- High-Friction Rubber Sole
- Sizing Guide — Australia & New Zealand
- N23 vs The Competition
- Full Castiron Grip Lineup
- Who Is It For?
- Formerly Rock Planet
- Sport Climbing Shoes in Australia & New Zealand — 2026
- Shop the N23
- Verdict & Rating
- FAQ
What Is the Castiron Grip N23?
The Castiron Grip N23 is a precision edging velcro climbing shoe built for intermediate Australian and New Zealand climbers who have outgrown beginner flat shoes and need a tool that performs on technical face routes. At AU$169, it sits between the aggressive PR23 and the all-round SWIFT — the ideal step-up shoe for climbers pushing into V4–V6 bouldering or 20–25 sport routes at Arapiles, Grampians, or Castle Hill.
Also see our earlier in-depth review: Castiron Grip N23 — Best Precision Edging Climbing Shoes for Intermediate Climbers | Australia & New Zealand 2026 →
Full Specifications
| Spec | Detail |
|---|---|
| AU Price | AU$169 |
| Closure | Dual Velcro |
| Last | Asymmetric, moderate-aggressive downturn |
| Rubber | High-friction rubber sole |
| Upper | Synthetic microfibre |
| Gender | Unisex |
| Best For | Sport climbing, precision edging, technical face routes |
Moderate-Aggressive Downturn — The Edging Advantage
The N23's moderate-aggressive downturn is its defining feature. Less extreme than the PR23's aggressive profile, it gives you precision on small edges without the discomfort of a full performance shoe. This is the sweet spot for intermediate climbers who need better footwork on technical face routes at Arapiles quartzite or Castle Hill limestone but still want to wear the shoe for longer sessions.
Dual Velcro Closure System
The dual velcro closure gives you a secure, adjustable fit with quick on/off between routes. For intermediate climbers doing multiple attempts on a project or moving between problems at the wall, this is the right closure system. Compared to lace-up shoes like the Castiron Grip SWIFT, the N23's velcro system trades micro-adjustability for speed.
High-Friction Rubber Sole
The N23 runs a high-friction rubber compound across the full sole — optimised for Australian sandstone, quartzite, and indoor wall resin holds. The rubber extends to the toe patch for precision on small footholds and smears on slabs at Grampians and Blue Mountains.
Sizing Guide — Australia & New Zealand
The N23 runs slightly small due to the asymmetric last. Size up 0.5 EU from your street shoe size.
| EU | AU/NZ Men's | AU/NZ Women's | UK |
|---|---|---|---|
| 35 | 3.5 | 5 | 2.5 |
| 36 | 4 | 5.5 | 3.5 |
| 37 | 4.5 | 6 | 4 |
| 38 | 5.5 | 7 | 5 |
| 39 | 6.5 | 8 | 6 |
| 40 | 7.5 | 9 | 6.5 |
| 41 | 8.5 | 10 | 7.5 |
| 42 | 9.5 | 11 | 8 |
| 43 | 10 | 12 | 9 |
| 44 | 10.5 | 13 | 9.5 |
Not sure on sizing? Email support@castironlift.com — we respond within 12 hours.
N23 vs The Competition — Australia & New Zealand 2026
| Feature | N23 | La Sportiva Katana Lace | Five Ten Hiangle |
|---|---|---|---|
| AU Price | AU$169 | AU$190–AU$220 | AU$200–AU$230 |
| Closure | ✅ Dual Velcro | ❌ Lace | ✅ Single Velcro |
| Asymmetric Last | ✅ Yes | ✅ Yes | ✅ Yes |
| Moderate-Aggressive Downturn | ✅ Yes | ✅ Yes | ✅ Yes |
| Free AU Shipping | ✅ Over AU$150 | Varies | Varies |
Full Castiron Grip Lineup — Which Model Is Right for You?
| Model | Closure | Downturn | Best For | Level |
|---|---|---|---|---|
| PR23 | Dual Velcro | Aggressive | Bouldering, overhangs | Advanced |
| N23 (this shoe) | Dual Velcro | Moderate–Aggressive | Precision edging, sport climbing | Intermediate–Advanced |
| SWIFT | Lace-Up | Moderate | All-round, sport climbing | Beginner–Intermediate |
| ONE | Velcro | Flat | Youth development | Youth |
| HUG | Velcro | Flat | Kids first shoe | Kids Beginner |
| Little ALIEN | Slip-On | Flat | Kids beginner, slip-on | Kids Beginner |
Who Is the N23 For?
- ✅ Australian sport climbers — Climbing Australia affiliated, Arapiles, Grampians, Blue Mountains
- ✅ New Zealand climbers — Climbing New Zealand affiliated, Castle Hill limestone
- ✅ Intermediate climbers — V4–V6 bouldering, grade 20–25 sport routes, ready to step up from flat shoes
- ✅ Indoor wall regulars — dual velcro for quick removal between routes
Formerly Rock Planet — Now Castiron Standard
The N23 was formerly available under the Rock Planet brand — same construction, same last, same proven rubber compound. Rock Planet built a strong reputation in the climbing community for accessible performance footwear, and that DNA carries directly into the Castiron Grip line.
Sport Climbing Shoes in Australia & New Zealand — 2026
The Australian and New Zealand intermediate climbing shoe market is dominated by imported European brands — La Sportiva, Scarpa, and Five Ten — with retail prices that regularly hit AU$190–AU$230 for intermediate velcro sport climbing shoes. For climbers affiliated with Climbing Australia or Climbing New Zealand who are ready to step up from a flat beginner shoe, the cost of a quality intermediate shoe is a real barrier. The Castiron Grip N23 enters the Oceania market at AU$169 — dual velcro, moderate-aggressive asymmetric downturn, high-friction rubber — with international shipping direct to Australia and New Zealand.
For Australian climbers heading to Arapiles or the Grampians, the N23's high-friction rubber performs well on the quartzite and sandstone that defines these iconic venues. The moderate-aggressive downturn gives you the toe precision needed for technical footwork on Arapiles face routes without being punishing on longer multi-pitch days. New Zealand climbers at Castle Hill will find the asymmetric last gives the toe engagement needed for the technical limestone footwork that makes Castle Hill problems so demanding. The dual velcro closure means quick removal between attempts at your local indoor wall — critical for high-volume training sessions.
International shipping to Australia and New Zealand: AU$25 standard (5–8 business days), AU$45 expedited (2–4 business days). Free shipping on orders over AU$150 — the N23 at AU$169 qualifies automatically.
Shop the Castiron Grip N23
N23 — Precision Edging Sport Climbing Shoe
AU$169 · Dual Velcro · Moderate-Aggressive Downturn · Free shipping over AU$150
Shop N23 — AU$169 →Verdict & Rating
Overall: ⭐⭐⭐⭐⭐ 4.6/5
- Edging Performance: 5/5
- Smearing: 4/5
- All-Day Comfort: 4.5/5
- Value for Money (AU/NZ): 5/5
- Versatility: 4.5/5
The Castiron Grip N23 is the top sport climbing shoe under AU$170 for Australian and New Zealand intermediate climbers. Dual velcro, moderate-aggressive asymmetric downturn, high-friction rubber — the perfect step-up from a flat beginner shoe for Oceania climbers in 2026.
Frequently Asked Questions
What is the difference between the N23 and the PR23 for Australian climbers?
The N23 has a moderate-aggressive downturn — better for all-day edging on Arapiles quartzite and technical face routes. The PR23 has a fully aggressive downturn — better for steep bouldering at Grampians. The N23 is the intermediate step-up; the PR23 is the advanced performance tool.
Is the N23 good for outdoor climbing in Australia?
Yes — the high-friction rubber performs well on Arapiles quartzite, Grampians sandstone, and Blue Mountains sandstone. The moderate-aggressive downturn gives you the toe precision needed for technical Australian sport routes without being punishing on longer routes.
Does the N23 run small?
Slightly — size up 0.5 EU from your street shoe size. The asymmetric last and synthetic upper have minimal stretch.
How long does international shipping to Australia and New Zealand take?
Standard: 5–8 business days at AU$25. Expedited: 2–4 business days at AU$45. Free shipping on orders over AU$150 — the N23 at AU$169 qualifies automatically.
Is the N23 approved for Climbing Australia competitions?
The N23 meets standard climbing shoe specifications for Climbing Australia and Climbing New Zealand affiliated competitions. Always verify current equipment rules with your specific competition organiser.
Should I get the N23 or the SWIFT for Australian sport climbing?
If you're climbing V4–V6 or grade 20–25 consistently and want better footwork on technical terrain, the N23 is the right choice. If you're still building technique and want an all-day comfortable shoe, the SWIFT is the better starting point.
External Resources
- Climbing Australia — Official Federation
- Climbing New Zealand — Official Federation
- theCrag — Australia & NZ Climbing Guide
- Climbing Magazine — Best Climbing Shoes Guide
- 99Boulders — Climbing Shoe Reviews
📚 More from the Castiron Grip Climbing Reviews Hub:
Castiron Grip Climbing Shoes Review 2026 — Australia & New Zealand Hub →
Written by T-K