Review: Lezyne Tech Drive HV Pumps

by
February 24, 2016

Just how many punctures do you need to test a pump? Rachel finds out.

Brand: Lezyne
Product: Tech Drive HV (small and medium)
From: upgradebikes.co.uk
Price: £24.99
Tested: by Rachel Sokal for 2 months

Reviewing a product for Singletrack comes with a certain level of responsibility. In turn, this responsibility is associated with a degree of anxiety: Have I captured enough details and described their pros and cons? Is my critique fair and honest? Have I balanced my personal opinion against an objective view? And most critically, have I used it enough to have identified these strengths and weaknesses? After all, how much testing is enough?

Lezyne pumpIt is safe to say that for this review the latter concerns do not apply. In the first week after I got these Lezyne pumps I had two punctures and by the end of the second week the total had reached five. Week three brought punctures six to nine and after four weeks I was on 13. As a resultant I’m fairly confident I’ve given these pumps a good go and I’m hoping by writing up this review my puncture run will finally come to an end.

Lezyne pump

The Lezyne Drive HV (high volume) small and medium pumps are identical in their features except, surprise surprise, one is bigger than the other; the small measures 170mm in length compared to 220mm of the medium (not including hose and end caps). There’s little weight difference between the pair – the medium is 127g versus 115g of the small – and the diameter is the same too, 27mm in the shaft and 31mm at the handle. The difference in length is enough that whilst the small slips easily in a jersey or pack pocket, the medium requires a bit more thought (it’s too long for the tool pocket in my pack and protrudes further than I’d like out my jersey pocket). The pump comes with a frame mount which attaches to bottle cage bosses. The mount does make the pump it easy to carry but it also means it’s subjected to collecting mud, grit and grime so I haven’t bothered using it.

Lezyne pump

Whilst the medium is not so convenient to pack away, the size does make a big difference when it comes to using, verified by my ‘scientific’ testing. Inflating a 29 x 2.20 tubeless Maxxis Ikon on an American Classic 28mm rim from ‘atmospheric pressure flat’ (I let all the air out without compressing the tyre / unseating) it took 120 full stokes with the medium pump to inflate to 21psi. After the same number the small reached 17psi and it took another 40 (total 160) to get it to 21psi. The choice between carrying convenience and pumping speed is yours.

Both pumps have a maximum pressure of 90psi. Although this is plenty for a mtb tyre it meant when I fixing one of my many commuter flats a fair amount of welly was required on the final few strokes. Personally I still prefer a high volume, low pressure mini-pump than the other way round (a low-volume, high-pressure version is available if not).

Lezyne pump

The Drive is very sleek and simple in its design and has a reassuringly chunky feel. It’s thick enough to be easy to grip – even with wet and muddy gloves – and nicely sturdy without any noticeable play during use. It features a flexible hose with both Schrader and Presta fittings which screws into the pump body for storage.

Lezyne pump

Using the pump is straight forward enough: screw the hose onto the pump then onto the valve and pump away. I quite like a screwed hose fitting rather than clamping straight onto the valve as I’m less concerned about damaging the valve or getting a poor fit even if it is a bit more of a faff. In the past I’ve had problems unscrewing Presta valves when detaching hoses. The Drive has a little bleed valve which is designed to prevent this happening by releasing the pressure in the hose before unscrewing and certainly I’ve not experienced any problems with this one so far. If you use the Schrader fitting this valve can be used to bleed pressure from the tyre if you’ve over inflated which is surely an unlikely occurrence mini-pump.

Lezyne pump

Overall: a sleek, robust mini-pump which does the job with minimal fuss. Can I stop getting punctures now please?

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Review Info

Brand: Lezyne
Product: Tech Drive HV (small and medium)
From: upgradebikes.co.uk
Price: £24.99
Tested: by Rachel Sokal for 2 months

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