MET's reborn Trenta 3K Carbon is one of the safest road helmets ever independently tested - and it's cooler than before, if a touch heavier and seriously pricey.
What changed: the 3K Airframe redesign
MET didn't just tweak the Trenta - it rebuilt it. The headline change is the new 3K Airframe, an integrated carbon skeleton that lets MET strip excess EPS foam out of the ventilation channels and replace it with three main foam ribs over the top of the helmet, tied together by the carbon frame.
According to Bikerumor's launch coverage, that frame allowed thinner carbon 'wings', deeper internal channels and better aerodynamics - the structural trick behind both the cooling and the safety gains. There are 24 open vents linked by a continuous channel that runs unobstructed from the front intakes to two rear exhaust ports.
By the numbers
Source: road.cc / Bikerumor
Cooler, but heavier - the trade-off
View data table
| Grams | |
|---|---|
| Previous Trenta 3K Carbon | 218 g |
| New Trenta 3K Carbon (2025) | 260 g |
The redesign's clearest win is cooling. MET says airflow is up 16% over the old Trenta, and testers back it up: Cycling Weekly's Aaron Borrill measured 261g and found the channelling moves heat off the head front to back.
The catch is mass. At 260g it's noticeably heavier than the roughly 218g version it replaces - still light for a road helmet, but no longer a featherweight. road.cc also flagged that the fit ran a little narrow, so it's worth trying a size before you commit.
How safe is it, really?
Safety is the redesign's reason for being. The new Trenta holds a Virginia Tech 5-star rating - the most rigorous independent helmet benchmark - and MET says it places among the top five helmets the lab has ever tested. For context, Bikerumor notes the previous Trenta ranked #174 of 282 helmets, so this is a genuine leap rather than a marketing nudge.
MET claims a 40% improvement in both linear and rotational impact testing versus the old model, helped by the ultralight MIPS Air Node system that redirects rotational forces in a crash with minimal added weight or bulk.
“Almost every rider of a World Tour Team experiences at least one high-speed crash per season, which is why minimising the risk of concussion is a top priority, at the same level as performance.”
What the reviewers make of it
Three takes from the cycling press
Independent verdicts from across the cycling press — follow each link for the full review.
Money-no-object all-rounder
“Lighter, more aero and better ventilated than its predecessor, and safer than almost any other helmet on the market”
Read the full reviewBrilliant airflow, trustworthy safety
“airflow is brilliant, and it can be felt throughout the helmet as air moves from the front to the rear”
Read the full reviewWorldTour's winningest helmet
“one of the best scores ever recorded”
Read the full reviewPrice aside, this helmet ticks all the boxes.
Old vs new: the spec sheet
| New Trenta 3K Carbon (2025) | Previous Trenta 3K Carbon | |
|---|---|---|
| Claimed weight (M) | 260 g | approx 218 g |
| Vents | 24 | 19 |
| Airflow vs old | +16% | baseline |
| Virginia Tech ranking | 'Top 5' ever (MET) | #174 of 282 |
| Rotational/MIPS | MIPS Air Node | MIPS Air Node |
| RRP | GBP350 (~R7 600) / USD450 (~R7 400) / EUR400 (~R7 500) | approx GBP290 (~R6 300) / USD379 (~R6 300) |
Specs: road.cc, Cyclist, Bikerumor
Should you buy one?
- Virginia Tech 5-star - MET claims a top-5 result of any helmet ever tested
- 40% better linear and rotational impact scores than the old Trenta
- 16% more airflow; reviewers confirm cooling is genuinely improved
- Sunglasses storage and build quality praised by road.cc
- Tailorable, comfortable fit (Cycling Weekly)
- Ships with a soft helmet bag
- WorldTour-proven - Pogacar's 2025 Tour-winning lid
- Expensive at GBP350 (~R7 600) / USD450 (~R7 400) / EUR400 (~R7 500)
- Heavier than the helmet it replaces (260 g vs ~218 g)
- Divisive looks (road.cc)
- Fit runs slightly narrow (road.cc)
- Only four colour options (Cycling Weekly)
Race pedigree and buying it in SA
Trenta 3K Carbon: a short history
- 2020Original Trenta 3K Carbon
MET launches its carbon-framed flyweight; a MIPS Air version follows at around 218g with 19 vents.
- 2025Ground-up redesign
The new 3K Airframe Trenta arrives: 24 vents, +16% airflow, +40% impact scores and a Virginia Tech 5-star rating.
- 2025 seasonWorldTour clean sweep
Worn to victory at the Tour de France (Pogacar), the Giro d'Italia Women (Elisa Longo Borghini) and the UCI Road World Championships.
Tap to vote — see how readers lean
Buyer questions
How much does the MET Trenta 3K Carbon cost? +
RRP is GBP350 (~R7 600) in the UK, USD450 (~R7 400) in the US and EUR400 (~R7 500) in Europe, including a soft helmet bag. South African pricing depends on the importer - use the live price check above for current ZAR figures.
How much does it weigh? +
MET claims 260g for a size medium; Cycling Weekly measured 261g. That's heavier than the roughly 218g previous Trenta - the cost of the larger carbon frame and added safety.
Is it actually safe? +
It holds a Virginia Tech 5-star rating and MET says it scores in the all-time top five, with a claimed 40% improvement in linear and rotational impact results over its predecessor, helped by MIPS Air Node.
Does it have MIPS? +
Yes - the ultralight MIPS Air Node system, integrated to redirect rotational forces in a crash with minimal extra weight or bulk.
Is it worth it over a cheaper helmet? +
Reviewers rated value 7/10 (road.cc): you pay a big premium for marginal weight and aero gains plus class-leading safety. If safety scores top your list, few helmets match it; if not, cheaper 5-star options exist.
Sources and further reading
- Met Trenta 3K Carbon review (8/10) — road.cc
- 2025 Met Trenta 3K Carbon review - is this the safest lid on the market? — Cycling Weekly
- MET Trenta 3K Carbon reborn, with 16% more airflow and 40% better safety — Bikerumor
- The new Met Trenta 3K Carbon is safer, cooler - and already the WorldTour's winningest helmet — Rouleur
- Met Trenta 3K Carbon Mips helmet review — Cyclist
- MET Trenta 3K Carbon helmet review — BikeRadar
The reborn Trenta 3K Carbon trades roughly 40g for one of the best independent safety scores in cycling and genuinely improved cooling - a sensible swap if your priorities are crash protection and hot-weather comfort. Reviewers love it (road.cc 8/10), with the only real gripes being the GBP350 (~R7 600)-plus price, divisive looks and a slightly narrow fit.
If money is no object and you want one of the safest, airiest lids on the market, it's a standout. If safety scores aren't your single deciding factor, cheaper 5-star helmets will do most of the job for far less.
