Prologo Scratch M5 Saddle Review 2026: Race-Ready Comfort in the Aero Position
Not every triathlete gets on with a noseless saddle. If you’d rather keep a traditional shape but want something built specifically for racing rather than all-day touring comfort, Prologo’s Scratch M5 is one of the more established race saddles that turns up on triathlon and TT bikes as often as road bikes.
Key Features
- Nack composite rails — a nano-carbon, kevlar and aluminium filament rail construction, with the version stocked here weighing well under 170g for the rails alone.
- Multi Sector System padding — the saddle surface is split into zones of different foam density, softer where pressure builds and firmer where you need stability.
- 140mm width — a narrower race profile than Prologo’s touring saddles, matched to riders who sit forward and low.
- Ergonomic T-Shape design — intended to suit both male and female riders without needing a separate gender-specific mould.
What We Like
Reviewers describe the Scratch M5’s ride feel as stable without feeling glued in place — enough padding to survive a long stage or 70.3 bike leg, without the bulk of a touring saddle sapping power transfer. The zoned padding is genuinely noticeable compared with a single-density foam saddle, particularly on longer rides where pressure points tend to build up over hours rather than minutes.
Where It Falls Short
It’s a traditional nosed shape, so it doesn’t solve soft-tissue pressure the way a noseless saddle like the ISM PN 3.0 does — if numbness in the aero position is your main complaint, this isn’t the fix. It also sits at a premium price point for a saddle, so it’s a considered upgrade rather than an entry-level buy.
Verdict
For triathletes who get on fine with a conventional saddle shape but want race-specific padding and a lighter, stiffer rail set than a stock saddle, the Scratch M5 is a solid step up — just don’t expect it to fix aero-position numbness the way a noseless design would.
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