UltraFire MT-05/ MT-05S bike light


Bike light comes in two varieties, one with a smooth reflector that produces a nice spot beam, and one with a lens that produces a great wide rectangular flood. They make a good combo, the MT-05 spot on the helmet and the MT-05S flood on the handlebars.

The lights feature 2 sets of lights:

  • a centre light using either a reflector (MT-05) or lens (MT-05S) with an XML-U2 led; and
  • a "ring" light with a circular array of about a dozen LEDS that illuminate the ring around the bezel.

Centre light

Centre light has 3 modes: high, medium and low accessed through the right hand button on the rear.

Ring light

Ring light has two modes - solid and flashing accessed through the left hand button on the rear. Light output in both modes is not particularly great, but is even in all directions. I'm not really sure what the point of the ring light is. Daytime riding in flashing mode perhaps?





Current draw

Main light:

  • high - 0.92A;
  • medium - 0.27A
  • low - 0.09A

Ring light:

  • steady - 0.13A
  • flashing - 0.05A

Battery packs

These lights are sold as just the head-unit only. What you get is the light, the bar mount clamp and a couple of o-rings. You can buy or make your own battery packs to go with them. With a current draw of only 1A @ 8.4V on high, I chose to make some 2S1P battery packs using Panasonic NCR18650B 3400mAh cells. These give run times in excess of 3 hours. I've also changed the connectors on all my lights to use the same screw type connectors as off the Fandyfire / Solarstorm X2 lights.

Screw type connectors

Mounting options

Like so many of these lights, they come with a half round plastic mount that uses o-rings to hold it onto either the bars or an adapter for helmet mounting. The o-ring mount is pretty ordinary for use off-road and will move back and forward in the rough.

I like to replace the mount with a Hope mount that features an adjustable cam and two replaceable rubber pads for 25.4mm or 31.6mm bars.

Hope light mount

Related articles:

Mountain bike books

Here's a few interesting mountain bike books if you're looking to spend some time reading between rides:

Lightweight 24" rims

There are not many lightweight rims available for 24" mountain bikes. The three options I know of are:

P60 to Vista Light Adapter

I machined up these adapters to allow me to use my old Vista Light housings that take MR11 halogen globes with the new P60 LED drop in modules. The P60 drop in modules are available in a great range ...

Kids bike weightloss

This article is all about taking a 13kg $200 kids bike and getting it on a diet without spending stupid amounts of money.

DIY lightweight stove wind shield

Here's something I quickly knocked up: a lightweight stove wind shield.

Lightweight 24" tubes

It is quite difficult to find lightweight 24" tubes, but I recently stumbled on a solution that so far has proved acceptable.