Cycling · Head-to-head
SILCA EOLO IV CO2 Regulator vs Lezyne Trigger Drive CO2
Which should you buy? Our verdict on both, pulled from our full The Best CO2 Inflators: 4 Compared (and One to Skip) comparison.
The EOLO IV is the most completely specified and most durable inflator here, with a metering dial, an all-metal body and a puncture pin SILCA rates for years of use. The Trigger Drive costs a fraction as much, is still machined aluminium, and threads onto Presta and Schrader with a neoprene sleeve for the cold.
SILCA EOLO IV CO2 Regulator
Buy itAll metal, properly regulated, and built by the company that invented the regulated inflator.
- Manufactured entirely from 6063 series aluminium and stainless steel, with no plastic parts anywhere in the body.
- A dial meters the gas into the tyre rather than releasing it in one burst, which is the whole point of a regulated inflator.
- SILCA states the hardened tool steel puncture pin is more than twice the hardness of a traditional pin, for smooth operation over many years.
- It is sold as the regulator only, so cartridges are a separate purchase.
- SILCA does not publish a weight for it.
- There is no trigger lock, so it relies on the dial being closed when stowed.
Lezyne Trigger Drive CO2
Buy itA CNC-machined aluminium head with a trigger valve, a Twin Chuck for both valve types and a neoprene sleeve, at the lowest price here.
- CNC-machined aluminium dispenser, so a metal body without the premium price.
- Trigger valve operation, which Lezyne describes as easy and controlled inflation.
- The Twin Chuck head threads onto both Presta and Schrader valves, and a neoprene sleeve insulates your hand from the cold cartridge.
- Sold with one 16 gram cartridge or as a head only, with a two year warranty on hard goods.
- Lezyne states it is compatible with threaded CO2 cartridges only.
- Lezyne lists 82 grams, the heaviest stated figure here.
- No trigger lock is described, so it depends on the trigger not being pressed in the bag.
Side by side
The 8 criteria below are the ones our full comparison judged every product on, narrowed to these two.
| SILCA EOLO IV CO2 Regulator Our pick | Lezyne Trigger Drive CO2 | |
|---|---|---|
| Our verdict | Buy | Buy |
| Best for | Riders who carry an inflator for years and want the one that will not seize or crack. | Most riders who want a metal, trigger-controlled head without paying for a precision regulator. |
| Price tier | $$$ · premium | $ · budget |
| Flow control | Metering dial | Trigger valve |
| Body material | 6063 aluminium and stainless, no plastic | CNC-machined aluminium |
| Cartridge threads accepted | Not published | Threaded only |
| Lock against accidental discharge | No | Not described |
| Head type | Press on Presta, thread on Schrader | Twin Chuck, threads onto Presta and Schrader |
| Manual backup included | No | No |
| Cartridges included | No, regulator only | One 16g cartridge, or head only |
| Published weight | Not published | 82 g |
Which one is right for you?
Pick the SILCA EOLO IV CO2 Regulator if
riders who carry an inflator for years and want the one that will not seize or crack.
Know before buying: it is sold as the regulator only, so cartridges are a separate purchase.
Pick the Lezyne Trigger Drive CO2 if
most riders who want a metal, trigger-controlled head without paying for a precision regulator.
Know before buying: lezyne states it is compatible with threaded CO2 cartridges only.
The bottom line
Our overall pick is the SILCA EOLO IV CO2 Regulator - All metal, properly regulated, and built by the company that invented the regulated inflator. Choose the Lezyne Trigger Drive CO2 instead if most riders who want a metal, trigger-controlled head without paying for a precision regulator.
Want the full picture, including the other options we compared and the popular one we'd skip? Read the complete The Best CO2 Inflators: 4 Compared (and One to Skip).