Babolat RPM Blast
Octagonal high-density co-polyester monofilament
Junior Player Guide
For ParentsRecommended Level
Tension for Juniors
46-50 lbs for juniors. String lower to unlock spin potential. Loses tension quickly so some players string 2-3 lbs higher.
Gauge Recommendation
17 (1.25mm) for best spin and feel. 16 (1.30mm) for more durability.
Overview
Babolat RPM Blast is one of the most iconic co-polyester strings ever made. When Rafael Nadal showed up at the 2010 Australian Open with this octagonally shaped co-poly, it changed the game. The octagonal structure with high-density co-polyester adds phenomenal rotation to the ball. The slick surface enables the strings to snap back with vicious force, resulting in extra RPMs. One of the most popular co-polys of all time, this firm and durable string is perfect for big hitters looking to load the ball with pace and spin.
Best For
- ✓ Heavy topspin players
- ✓ Advanced juniors with fast, full swings
- ✓ Players who generate their own power
- ✓ Western/semi-western grip users
Not Ideal For
- ✗ Beginners or intermediates with short swings
- ✗ Players with arm issues - can cause tennis elbow
- ✗ Flat hitters
- ✗ Those seeking comfort
Pros
- + Exceptional spin potential (97/100 in testing)
- + Excellent control on fast swings
- + Proven at the highest professional level
- + Good for generating heavy topspin
- + Surprisingly comfortable for a stiff poly
Cons
- − Loses tension and playability quickly
- − Can cause tennis elbow for some players
- − Below average durability for a polyester
- − Requires advanced technique to unlock benefits
- − Not powerful - need to generate your own pace
Specifications
Used By
Hybrid Setup Ideas
- VS Touch natural gut mains + RPM Blast crosses (Nadal setup)
- Xcel multifilament mains for comfort
- Great as crosses in any hybrid
Stringer Notes
Pre-stretch recommended. String at lower tensions to maximize spin. Loses tension quickly in first 24-48 hours. Great as crosses in hybrid setups with natural gut.
Break-in Period
1-2 hours. Settles quickly but starts losing playability soon after.
When to Replace
Every 8-12 hours for competitive players. Tension loss is the main issue - string goes dead before it breaks.
Similar Strings
Sources
Data verified January 2025
- Specs: Babolat Official
- Pricing: Tennis Warehouse
- Review: Tennis Warehouse Review
- Review: Tennis Companion Review
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