Kirschbaum · Polyester
Kirschbaum Pro Line II
Round co-polyester monofilament with pre-stretch treatment
Performance ratings
Overview
Kirschbaum Pro Line II is one of the softest and most responsive co-polyester strings available. Built on 20+ years of German polyester expertise from the company that pioneered polyester tennis strings, Pro Line II offers better pocketing and a more forgiving feel on off-center impacts compared to traditional polyesters. The pre-stretch treatment ensures consistent playability with precise and predictable response, enabling players to swing bigger when going for pace and spin.
Best for
- Players wanting soft, responsive poly
- All-court players seeking versatility
- Those who want poly control with better feel
- Tournament players on a budget
Not ideal for
- Players with serious arm issues
- Those seeking maximum spin
- Players wanting ultra-crisp response
Pros
- Soft and responsive for a poly
- Pre-stretched for tension maintenance
- Good pocketing and forgiveness
- Predictable, precise response
- Excellent value
- Used by Grand Slam champion Angelique Kerber
Cons
- Not the most spin-friendly
- Round profile limits bite
- Still a poly - not for arm issues
Stringer notes
Pre-stretched - ready to install. Great tension stability. One of softest polys available.
Break-in period
Minimal due to pre-stretch treatment.
When to replace
Every 15-20 hours or when feel becomes mushy.
Hybrid setup ideas
- Kirschbaum Touch Multifibre crosses
- Wilson NXT crosses for comfort
- Natural gut mains for premium feel
Used by
Angelique Kerber (former), Jan-Lennard Struff, Carlos Moya (former), Vera Zvonareva
Specifications
- Type
- Polyester
- Construction
- Round co-polyester monofilament with pre-stretch treatment
- Gauges
- 16, 17, 18
- Colors
- Black
- Set price
- $10–$13
- Reel price
- $90–$110
- Brand
- Kirschbaum (Germany)
Sources & reviews
Data verified January 2025. Something wrong? Send a correction.
- Specs: Kirschbaum Official
- Pricing: Tennis Warehouse