Castiron Grip
Castiron Grip N23 — Precision Edge Climbing Shoe
Castiron Grip N23 — Precision Edge Climbing Shoe
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Aggressive downturn. Dual strap. High-friction rubber. The N23 was built for climbers who need their shoe to do exactly what they tell it — nothing more, nothing less.
Precision edging on vertical faces. Secure lockdown on overhangs. The N23 doesn't negotiate with the wall — it reads it.
Formerly Rock Planet N23 — same production, same performance. Castiron standard.
Built For
- Indoor bouldering
- Overhang climbing
- Precision edging on vertical routes
- Intermediate to advanced climbers
Technical Specs
- Closure: Dual velcro strap
- Sole: High-friction rubber — precision edging and heel hooking
- Toe box: Aggressive downturn for performance on overhangs
- Upper: Synthetic microfiber — Pink / Grey / Yellow
- Sizes: EU35–44
- Colours: Pink, Red
Sizing
Runs small due to aggressive downturn. Consider going up 0.5–1 EU from your normal size. Women size up 1.5 from men's US sizing. See our size guide for full conversion.
Formerly Rock Planet
The N23 was previously sold as Rock Planet N23 — trusted by climbers across Europe, the UK, Australia, and North America. In 2026, the line became Castiron Grip. Same shoe. Castiron identity.
FAQ
Is this the same as the Rock Planet N23?
Yes. Same production, same performance standards. Rebranded under Castiron Grip in 2026.
How aggressive is the downturn?
Moderate-aggressive. More than a beginner shoe, less than a pure competition shoe. Ideal for V3–V7 bouldering and 5.10–5.12 sport climbing.
Materials
Materials
If you have any questions about the materials of the product, you can check the product details page or contact customer service
Shipping & Returns
Shipping & Returns
If you’re looking to return or exchange your order for whatever reason, we're here to help! We offer free returns or exchanges within 14 days of receiving your order. You can return your product for store credit, a different product, or a refund to the original payment method.
Please note the following exceptions to our return and exchange policy:
Below are some examples of common exceptions.
· Returned items must have no visible signs of wear or use
·Returned items need to still be labeled and returned in their original packaging
If you want to initiate a return or exchange, complete the following steps:
1. Log in to our online returns portal using your email address and order ID
2. Select the products you want to return or exchange from your order
3. Print the prepaid shipping label you will receive via email
4. Send all items back to us using the label provided
Dimensions
Dimensions
For size problems, you can view the product detail interface or contact us through customer service, thank you for your support!
Care Instructions
Care Instructions
The maintenance can be viewed in the product details interface or contact us through customer service
About us
Our company is a clothing supplier focusing on sports fitness, mountaineering and climbing, we provide good quality, cost-effective sports equipment, thank you for your trust!