Al Ruscelli's Mountain Bike Pages
Lockblocks and Bikeblocks for Mounting Small Flashlights to Bicycle Helmets
E-mail Al: email@example.com
Photos © Al Ruscelli Photography
A Bit of Visual Help for Determining Whether You Need a TwoFish Lockblock or a TwoFish Bikeblock to Mount a Small Flashlight to Your Helmet
The Bell Variant helmet on the left is more suited to using a Bikeblock, but the Giro Flume helmet on the right is more suited to a Lockblock if mounting a small flashlight to the helmet. Make note of the attachment points in the photos. The Bikeblock attaches to a bridge that runs parallel to the light and the Lockblock attaches to a bridge that runs perpendicular to the light. Some helmets will work with both, but most likely one or the other will be a better choice depending on the design of the helmet in question. I've used longer lights here (with the Fenix L2D Premium 100 lights, which run on two AA batteries) than most people might affix to a helmet, but the concept is still the same for a shorter, more compact light. Other good possibilities would include flashlights like the Fenix P2D which runs on a single CR123A battery and is much shorter/compact than the flashlights in these photos, but could still be attached with the same Lockblock/Bikeblock mounts.
TwoFish Lockblocks and TwoFish Bikeblocks Compared
The TwoFish Lockblock has two straps that are perpendicular to each other with perpendicular U-joints and the TwoFish Bikeblock has one long strap wraps around two parallel U-joints. (I call them U-joints for lack of a better descriptive term). The Lockblock has a small U-joint and a larger U-joint and the Bikeblock has two large U-joints. The Lockblocks are best used to attach a light that runs perpendicular to the object to which it attaches (for instance, handlebars or the Spacebars I use). The Bikeblocks are best used to attach a light that runs parallel to the object to which it attaches (for instance, a helmet joint as seen in the photos farther down this page). The Lockblocks and Bikeblocks can also be used to attach other items to bikes like bike pumps or U-locks, etc.
Admittedly, there are more photos here than anyone really needs to see. But there ought to be enough angles to get a pretty good look. And I am figuring out, though, that with the larger U-joints on the Bikeblocks, it's harder to get a light as slim at the L2D locked in snugly. The Lockblock as a wider and a narrower U-joint, but the Bikeblock has two wide U-joints. The width of the U on the Bikeblock is slightly too large to be a snug fit for the L2D (takes more effort to cinch it into place than is needed with the Lockblocks).
Attaching a Helmet Light
Not yet having a proper helmet light, I did some experimenting by mounting one of the Fenix L2D lights to my Bell Variant helmet using one of the TwoFish Lockblocks. The Lockblocks do not fit my helmet well and need to be replaced with something like the TwoFish Bikeblocks with parallel straps for a better fit on the helmet (as opposed to the perpendicular straps of the Lockblocks).
I rode with one L2D on the spacebar (as attached to the bike handlebars) and one L2D on the helmet. Although there was some light drop-off from not having both L2D lights directed consistently on the road in front of me, the second light on the helmet made up for it in many ways (often being directed straight in front of me anyway, or when not directed in front of me, pointed toward where I needed to see when making turns, etc.). In many ways, I found the ride with the lights in this configuration better than the dual handlebar light setup. However, what I think would be nearly ideal for me would be the dual L2D handlebar setup along with a matching L2D on my helmet. Smaller, more compact options are available for the helmet, but I like the idea of having three lights with consistent power source (with the rechargeable AA batteries) and the fact that all three lights would be interchangeable. Thus, I'm seriously considering a triple L2D setup. (Note: I have indeed moved to a triple L2D setup after the initial writing -- one on helmet, two on handlebar.)
Fenix L2D Attached with a Lockblock
(Notice how far back the light must be mounted on this helmet to accommodate using the Lockblock)
And the Helmet After Attaching a TwoFish Bikeblock to Replace the Lockblock
(After acquiring a third L2D light specifically for the helmet. Light can be mounted much farther forward using the Bikeblock)
This Is a Random and Mostly Meaningless Shot, Not a Working Configuration
(Just playing with the lights while doing the Lockblock and Bikeblock shots)
A Rather Outrageous Three-Light Helmet Setup
(Three Fenix L2D Premium 100 Lights Attached to Helmet with TwoFish Bikeblocks)
This is not really a very practical configuration since the flashlights and mounts end up more than doubling the weight of the helmet. But it was fun playing around with making a monster helmet light setup.
Inspired by 4sevens of the CandlePowerForums and 4sevens.com (and his frightening five-light helmet)
ZebraLight SC600 Attached Via a Mount Similar to a TwoFish Bikeblock
This mount is a Universal Nylon Mount for Flashlights and Lasers from DealExtreme (DX)
Testing, testing...Oops. (Back to the drawing board.)
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