MTB mini pump test: Syncros Boundary 1.5 HV - solid all-rounder in two sizes

If you often get a flat tyre on tour, you should buy a so-called high-volume mini pump. These powerful bicycle pumps are designed to inflate fat tyres particularly quickly. With the Boundary 1.5 HV, Syncros offers a choice of two different sizes. We have tested the larger version in detail.

Syncros Boundary 1.5 HV mini pump - Equipment

Syncros equips its Boundary with an extension tube including a mini valve head with clamping lever. This fits both Presta and Schrader valves, but requires a little more work to be screwed on. The cylinder, piston and handle are made of aluminium.

A rubber sleeve secures the handle sleeve to the cylinder. Thanks to the frame bracket supplied, this would not be necessary: One clamp holds the cylinder, the other holds the grip sleeve. This is practical and reliably prevents rattling and unintentional extension of the pump when there is a lot of rattling off-road.

Handling / processing

The matt black finish of the Syncros has a high-quality appearance and feels "softer" in the hand than you would expect from an aluminium mini-pump. The layout of the handle lengths is also pleasing. There is enough room for both hands without the risk of pinching your fingers.

The small pump head, on the other hand, is less successful. It is difficult to place on the valve, the clamping lever is tricky to move and it is easy to bend the small screw on Presta valves. Changing to Schrader is also more complicated than with many other models because the rubber seal is difficult to pull out of the pump head. Once the Syncros is ready for use, it is pleasant to handle. There are no edges to pinch your hands and the short tube also makes it easier to inflate the tyres.

Pumping capacity / manual force

The Syncros needs a good 100 pump strokes to reach our target of 2 bar. This puts it in a good midfield position. However, the pumping forces remain pleasantly low and the arms are spared. Caution: If the pump head is not optimally positioned on the valve, the air flow is obstructed and pumping becomes significantly more difficult.

Are you looking for a floor pump for the workshop rather than a mini pump for travelling? Read our last detailed test of 10 floor pumps.

Syncros Boundary 1.5 HV mini pump - Info & Price

• Price 35,95 Euro >> available here
• Weight (pump/holder) 119 g / 20 g
• Length / Diameter 210 mm / 26.5 mm
• Valve type Presta / Schrader
• Equipment Extendable hose; clamping lever incl. dust cap;
• Pump strokes per bar / pressure max. 104 / 5.5 bar

Conclusion & evaluation

Syncros offers a lightweight and reasonably compact mini pump at a fair price. When pumping, it scores with low manual force and a comfortable grip. The extendable tube also makes it easier to inflate the tyres. Less good: the small pump head with a fiddly lever and awkward valve type change. Thanks to the cleverly designed bracket, the Boundary doesn't rattle on the frame during transport, even on bumpy roads.

Click here to go back to our overview article: 11 mini pumps in the test. There you will find all the important information on the subject as well as the remaining 10 models in the test field.

* Note: Weight, size and pump strokes per bar are BIKE measurements. We measured the pump strokes per bar with a precision manometer on the volume corresponding to a 29x2.35 inch tyre. The maximum pressure is a manufacturer's specification.