Sirius Mk10 + TraceR MK2 ReAKT Pack - Ultimate Sports Engineering Ltd

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Technical Specifications:

LEDs Sirius 1 x XPL2(W3)|1 x XPE-R
IP Rating IP65
Max Lumens 900|120
Battery 3,500 mAh/700 mAh Li-Ion
Runtime 1.5 - 36|3 - 24 Hours
Charging Time 4 Hours/3 Hours
Weight 84g/35g
Material Anodised 6063 Aluminium
Length 110mm|57mm
Head Diameter 28mm|28mm
In The Box Sirius MK10 DB, TraceR MK2 ReAKT, QR Seatpost Mount, QR Handlebar Mount, 1 x Micro USB Charge Cable, 1 x USB Charge Cable, QS Guide.

Sirius Mk10 + TraceR MK2 ReAKT Pack


Our new 900 lumen Sirius front light paired with the smart TraceR ReAKT rear light, gives you the best and most compact front and rear light comb. See down the road ahead in the darkest of nights and be seen from behind on even the brightest of days. This superb combination ensures you stay visible with 240° visibility and our bespoke daytime running pulse mode DayBright. Day and night, rural or urban, the Sirius TraceR pack has you covered.

In the box:Sirius MK10 DB GMB + BOOST-R ReAKT, Seatpost Mount, Handlebar Mount, 1 x Micro USB Charge Cable, 1 x USB Charge Cable, QS Guide.

Out Of Stock

Quick Stats:

1.5 - 36|3 - 24
Hours Runtime
Lumens Measured Output
Grams Weight



Smart Port+ enables the charge port to accept auxiliary accessories such as rear lights, remote switches, Support Cells and use your light as a power bank to charge USB devices.


Rear lighting that flares up automatically under braking. It can also intelligently adapt to the surrounding ambient light conditions to maintain maximum contrast and visibility, for example brightening for street lit areas and moving into sunlight from shade.


Various programs in the lights can easily be selected to offer a choice of run times and modes so you can find the right one for your ride, be it an all-night adventure or an intense blast.


Patented circuitry within the light will reduce power to the LEDs, if they go beyond the optimum temperature, keeping the light as efficient as possible to maximise output and battery capacity. Once the light has cooled, the power is automatically restored.

Fuel Gauge Fuel Gauge

Using a traffic light system remaining runtime is easily monitored at a glance so you’re not caught out. The colour feedback is also used for mode selection, before defaulting back to runtime.

Daybright Daybright

Bespoke pulse pattern designed for daylight use which is more conspicuous than a regular pulse and visible over a kilometre away, even in the brightest conditions. DayBright mode will you noticed. Be Seen be Safe



Specifications Sirius MK10 TraceR MK2 ReAKT
Output 900 lumens 120 ReAKT Flare, 75 lumens red
Weight 84grams 35grams
Burntime Min 2 hrs Max 36 hrs Min 2 hrs Max 36 hrs
Battery Capacity 3500 mAh Li ion 700 mAh Li ion
Dimensions (mm) Length - 110, Head - 28, Back – 28 Length - 57, Head - 28, Back – 19
LED 1x XPL2(W3) 1x XPE-R


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