Estimated reading time: 12 minutes
Table of Contents
- What Is the Castiron Grip SWIFT?
- Who Is the SWIFT For?
- Moderate Downturn — All-Day Versatility
- Lace-Up Closure System
- High-Friction Rubber Sole
- Sizing Guide — USA & Canada
- SWIFT vs the Castiron Grip Line
- Formerly Rock Planet — Now Castiron Standard
- Verdict
What Is the Castiron Grip SWIFT?
The Castiron Grip SWIFT is an all-round lace-up climbing shoe built for climbers who want versatility without sacrificing performance. Moderate downturn, lace-up closure for micro-adjustable fit, and a high-friction rubber sole that works across gym walls, limestone sport routes, and granite slabs. This is the shoe for beginner to intermediate climbers who want one shoe that does everything well — from their first outdoor lead at Rumney to projecting 5.11s at their local gym.
At $109 USD, the SWIFT sits in the same performance tier as the PR23 and N23 — same price, broader application. Available in EU 35–44.
Who Is the SWIFT For?
The SWIFT is built for climbers who need a versatile all-rounder that performs across multiple disciplines and terrain types. Specifically:
- Gym climbing — routes and bouldering in the 5.9–5.12 range
- Outdoor sport climbing — limestone and granite routes where comfort over longer sessions matters
- Trad climbing — moderate trad routes where a flatter, more comfortable shoe is preferred
- Beginner to intermediate climbers — first outdoor leads through to 5.11+
If you are buying your first performance shoe after a rental flat, or you want a comfortable all-day shoe alongside a more aggressive model, the SWIFT is the right choice.
Moderate Downturn — All-Day Versatility
The SWIFT's moderate downturn sits between a flat beginner shoe and the aggressive curl of the PR23. This gives you enough toe sensitivity for technical footwork without the foot fatigue of a fully downturned shoe — making the SWIFT the right choice for longer sessions, multi-pitch routes, and climbers still developing their footwork technique.
The SWIFT's moderate downturn profile works well for:
- Vertical face climbing — edging and smearing on granite and limestone
- Slab climbing — balance moves where a flatter platform gives more confidence
- All-day sport climbing — comfortable enough to wear between pitches without taking off
Lace-Up Closure System
The SWIFT's lace-up closure gives you the most precise fit of any shoe in the Castiron Grip line. Laces let you adjust tension independently across the toe box, midfoot, and ankle — dialling in the exact fit for your foot shape. This is particularly valuable for climbers with narrow or wide feet, or those who need different tension zones for different route types.
The trade-off vs velcro shoes like the PR23 and N23 is speed — laces take longer to adjust between problems. For sport climbing and trad where you keep the shoe on between routes, this is not an issue. For bouldering sessions with frequent on/off, velcro is faster.
High-Friction Rubber Sole
The SWIFT runs the same high-friction rubber compound as the PR23 and N23 — optimised for indoor gym walls and outdoor limestone and granite. The moderate downturn means the rubber contact patch is broader than on aggressive shoes, giving you more surface area for smearing and slab moves.
Sizing Guide — USA & Canada
The SWIFT fits closer to street shoe size than the PR23 due to its moderate downturn. Size up 0.5 EU if between sizes. Women should size up 1.5 from men's US sizing.
| EU | US Women | US Men | UK |
|---|---|---|---|
| 35 | 5W | 3M | 2.5 |
| 36 | 6W | 4M | 3.5 |
| 37 | 6.5W | 4.5M | 4 |
| 38 | 7.5W | 5.5M | 5 |
| 39 | 8.5W | 6.5M | 6 |
| 40 | 9W | 7M | 6.5 |
| 41 | 10W | 8M | 7.5 |
| 42 | 11W | 9M | 8 |
| 43 | 12W | 10M | 9 |
| 44 | 13W | 11M | 9.5 |
Free shipping on US orders over $150. Ships from our US warehouse. Standard delivery 5–8 business days. Expedited 2–4 business days.
SWIFT vs the Full Castiron Grip Line
Not sure which model is right for you? Here is how the full lineup stacks up — click any model to go straight to the product page.
| Model | Closure | Downturn | Best For | Level |
|---|---|---|---|---|
| PR23 | Dual Velcro | Aggressive | Bouldering, overhangs | Advanced |
| N23 | Dual Velcro | Moderate–Aggressive | Precision edging | Intermediate |
| SWIFT (this shoe) | Lace-Up | Moderate | All-round, sport climbing | Beginner–Intermediate |
| Little ALIEN | Slip-On | Flat | Kids beginner | Youth Beginner |
| ONE | Velcro | Flat | Youth development | Youth |
| HUG | Velcro | Flat | Kids first shoe | Kids Beginner |
→ Browse the full Castiron Grip collection
Formerly Rock Planet — Now Castiron Standard
The SWIFT was formerly available under the Rock Planet brand — same construction, same last, same proven rubber compound. Rock Planet built a strong reputation in the US and Canadian climbing community for accessible, versatile footwear, and that DNA carries directly into the Castiron Grip line. If you climbed in Rock Planet shoes, you already know what the SWIFT delivers.
The Castiron Grip line represents the next chapter: unified brand standards, expanded sizing, and a next-generation model lineup arriving in 2027. The SWIFT is the current generation — and it is the same shoe that earned Rock Planet its reputation.
Verdict
The Castiron Grip SWIFT is the all-round lace-up climbing shoe for beginner to intermediate climbers who want one shoe that performs across the gym, the crag, and everything in between. Moderate downturn, lace-up precision, high-friction rubber — versatile, honest, and built to last.
$109 USD. EU 35–44. Free shipping on US orders over $150.
Castiron Grip SWIFT — All-Round Lace-Up Climbing Shoe
Moderate downturn · Lace-up closure · High-friction rubber · EU 35–44
External Resources
- USA Climbing — National Federation
- Climbing Canada — National Federation
- IFSC — International Federation of Sport Climbing
- Mountain Project — Route Database USA & Canada
- 99Boulders — Climbing Shoe Buyer's Guide
Written by T-K