Upping urban visibility: The Redshift Sports Arclight system in action

Previously I went over Redshift Sports’ cleverly engineered Arclight pedals and light module system, and how the engineering and interoperability all works. Today I will share how it is in action.

Disclaimer: Redshift Sports sent me the Arclight pedals and light module as a free review unit. No money changed hands. While I may use their PR material from time to time, all thoughts and review impressions are – and will be – my own.


The modularity of the Arclight system comes into play when the lights are clicked into the optional multi-mount. They can then be used as either a to-be-seen front light, or a rear light.

The multi-mount comes with one rubber O-ring and a zip tie. Both fastening methods are smartly accounted for by the design of the “ears.” Redshift also bundles a spacer and a longer bolt, which can be added if you want it pushed farther away from the mounting surface. The theory goes that the O-ring, with its knurled grab tab, is for temporary fitment, while the zip tie is for a more permanent arrangement.

One criticism: the lone O-ring supplied may be a little too short. Hyro, my TCX, runs a non-round D-Fuse seatpost, but it’s closest to a round unit with 30.6 mm diameter. Fitting the multi-mount onto it with the O-ring is quite tight already. Attempting to do the same on my folding bike Bino, with his 33.9 mm diameter seatpost, is just asking for trouble. With such bikes, if you don’t have a large enough O-ring on hand, the zip tie method is the only way to go.

So how does an Arclight LED module act as a rear light?

From a glance, I’d peg output at about 50-60 lumens. Many rear lights in 2022 sport at least this much light output, and are marketed as effective even in daytime riding use, so this is right up there with them I reckon.

(L) Arclight LED module, (R) Cygolite Hotrod 90 USB

A side-by-side comparison with my Cygolite Hotrod 90 rear light tells a more complete story. The COB LEDs on Arclight need to alternate between red and white, so the emitters are mounted accordingly along the circuit board. Looking closely, you can spot the little gaps this results in. The Hotrod 90, in contrast, is a dedicated rear light; its tightly grouped red LED emitters give a much more solid glow akin to a neon light stick. I suspect it’s mainly here that the extra light output is generated.

The Cygolite unit also has double the modes of the Arclight module. Where the latter has a solid burn mode and two flash patterns with a basic regular rhythm, the Hotrod 90’s six modes offer more variation in flash pattern brightness and timing. This results in a more flexible light that can be geared toward either retina-searing “look at me” visibility in daylight, or a more eye-friendly pulse when riding in a paceline.

Given the Arclight LED modules’ design brief, I wouldn’t hesitate to run one as a fit-and-forget rear light…if you can get the mounting sorted.


Even before install, I had inadvertently put the pedals through the test via unintentional drop onto a concrete floor from about 50 cm. My fingers had fumbled and lost their grip on one of them, which already had two light modules loaded in. After tumbling to the floor, everything still worked. The pedal body gives pretty good coverage and protection of the light modules, with only their power/mode buttons sitting anywhere near proud of it.

The rear light loop on Bino’s saddle bag would be nice to hang the multi-mount on, had there been a suitable “clip” piece supplied.

I swapped out the Shimano Saint PD-MX80 pedals off Bino and threaded the Arclight ones on. At first glance, their shallow traction lugs appear short on grip; the downhill-focused Saint pedals with their variable-height traction pins take the visual win. However, when both pedals inevitably strike your shins and ankles, the Arclight pedals also won’t pose an infection risk the same way the Saints will. Horses for courses.

Appearances are deceptive though. These pedals are very satisfying underfoot. Pushing them along with Keds slip-ons, I did not find myself wanting for grip, although the jury’s out if that still applies on a wet ride. Pedal size is well judged, and despite not resorting to any convex or concave shaping in the body, the chunky items just work.

Slipped into the pedals, the light modules remained visible even on a bright sunny afternoon, and could definitely pass muster as a daytime running light array…provided you have them in the correct mode. Side visibility is excellent too thanks to the sizable cut-outs in the pedal bodies. I would leave “eco flash” mode solely for nighttime use, though, as it lacks oomph.


I’m not sure Redshift had my particular use case in mind.

If it isn’t obvious yet, I think Redshift has a great product here. The Arclight pedals and light system smartly innovate on the humble pedal reflector – and even expand on it. That’s backed up by how well it works in real-world riding.

What I’m concerned about is the price. At US$140 (PhP7,310), these are decidedly premium commuter pedals – a little bit more, even, than what Shimano Deore XT PD-M8100s cost. This doesn’t include the US$40 (PhP2,090) outlay for a light module + multi-mount combo, either. When you think about the price encompassing both a pair of pedals and a set of to-be-seen lights…the answer to the “what price safety?” question, I’ll leave up to you.

Speaking of the multi-mount: neat idea, but its mounting hardware constrains its versatility. While the provision to thread a zip tie through it opens up its use to any bike or any seatpost, that also means a degree of permanence not everyone is willing to commit to – such as, say, cyclists on folding bikes. Perhaps bundling a second larger size of O-ring would help. More importantly, a lot of saddle bags have loops for fitment of a rear light, which Redshift seems to have ignored. Why not throw in another plastic piece that will enable hanging the multi-mount off that?

Combining the Arclight pedals with the Lumos Ultra helmet just might be a commuter cyclist’s nighttime visibility pipe dream. I understand the cost of making all this as simple, as functional, and as robust as it can be. If it were a little more affordable, I think this product would easily find more fans.

Upping urban visibility: First look of the Redshift Sports Arclight pedals and light system

Philadelphia firm Redshift Sports is no stranger to this blog. I bought their ShockStop suspension stem four years ago, before they had any distribution in the Philippines, and was so impressed with it that I still use mine to this day. They’ve since had a slew of other products, targeted for gravel riding and triathlon, but now they’ve turned their itchy mechanical engineering hands and smarts over to the commuter cycling segment.

Longtime readers know that I am a huge advocate for running lights on your bike instead of reflectors, even in the daytime. They do much more to increase your visibility to other road users, which is often enough to ensure you aren’t ignored as a rider. What if you could combine the attention-grabbing motion of pedaling with lights, instead of just reflectors? This isn’t a new premise by any means, but with the Arclight pedals, the Redshift Sports boffins have come up with a frankly ingenious solution that extends the concept.


  • Flat pedals with aluminum construction; steel spindle; sealed bearings
  • 97 mm x 95 mm platform; molded traction lugs
  • Four dual-color COB LED light modules included; two modules per pedal
  • Charging via USB type-A connector; four-way hub included for simultaneous charging
  • Modes and expected run time
    • Steady – 3 hours
    • Flash – 11 hours
    • Eco Flash – 36 hours
  • Motion-detection-based automatic shut-off logic
    • Standby mode – after 30 seconds no movement
    • Sleep mode – after 150 seconds no movement
    • Off – after 24 hours no movement
  • Optional multi-mount allows LED light module to act as either a front light or rear light
  • Weight (claimed): 305 g per pedal; 30 g per light module
  • Price: US$140 for the pedals and lights set; US$40 for the multi-mount and one light module

Disclaimer: Redshift Sports sent me the Arclight pedals and light module as a free review unit. No money changed hands. While I may use their PR material from time to time, all thoughts and review impressions are – and will be – my own.


In isolation, the Arclight pedals themselves are pretty normal platform items at first glance. They’re aluminum, with a few traction lugs molded into their perimeter. Like most pedals, they will mount up to your crank arms via 15 mm wrench flats or a 6 mm hex key on the end of the steel spindle.

A closer look into the cavities for the light modules yields some very interesting details. On the inboard side sit a pair of round magnets, one for each light module. These work with grooves and lugs in the cavities as a retention mechanism. I suspect these are some sort of rare earth or neodymium magnet. While the light modules slide and click into place, it takes a firm, intentional tug to remove them, and they’re only ever coming out the way they came in. There’s even a little keyway to accept the exposed USB type-A charging plug on each light module.

Photo credit: Redshift Sports

Speaking of the light modules, each is made of ABS plastic encasing a strip of COB LEDs in both white and red, and has a little button at the end. This acts as the master on/off switch and the mode select switch, of which there are three (see “Features”). Beneath it is a small status LED that will glow orange while charging, and green for 15 minutes when done – after which they will turn off. This also appears to show current state of charge as well when turning on the light module.

With regard to charging, Redshift bundles in a four-way USB type-A charging hub so that you can charge all four light modules at once. Neat. Claimed charge time this way is two hours to full.

Unlike Look’s Geo Trekking pedals, which can also incorporate lights, Redshift cleverly thought of making Arclight as a modular system – hence the reference to the lights as “modules.” Extending the concept means the light modules can be used outside of the pedals, and act as either a front light or a rear light. This is done with the multi-mount.

The multi-mount is essentially a plastic sled that incorporates the exact same magnet-based retention system built into the Arclight pedals. On its back side are two ears and a curved pad, for fastening it to either handlebars (in a horizontal fashion) or seatpost (in a vertical position), either via the supplied rubber O-ring or a zip tie. While optional, this is ingenious. Ordering the full set of extra light module and multi-mount in conjunction with the pedals does add $40 to your expense, but as an all-in-one urban commuting setup of “to-be-seen” lights, this makes sense.

Photo credit: Redshift Sports

I’d run this fifth light module as a rear light and get a more powerful front light…but hey, options.

A closer look at the multi-mount also explains how the Arclight pedals perform their best party trick. All you really have to do is turn the light modules on. As you pedal, the lights automatically work out where their position is, and will glow red or white accordingly.

How do they do this? It’s down to the magnets.

The multi-mount’s two exposed magnets gives a better insight as to how the Arclight’s LED modules work.

On the pedal bodies, all you see are the magnets at the inboard end, but the multi-mount exposes another magnet just behind the lengthwise edge of the light module. This magnet is hidden away somewhere in the pedals’ spindles. The interaction of the magnets’ polarities and the position of the light modules determines what color they glow.

The final trick is the automatic shutoff logic for the light modules, which is motion-detection-based and works when they’re mounted to the pedals or the multi-mount. This makes the Arclight system fit-and-forget until the lights need recharging.

When the light modules are detached from the pedals or multi-mount, the color-changing and auto shut-off functionalities are inactive – all of that is cycled through via button presses.


Photo credit: Redshift Sports

Redshift claims the pedals run on sealed bearings, and spinning them in hand yields a smooth, buttery action not unlike the Look X-Tracks I run. That said, I can’t find a way of dismantling these easily for servicing. I suspect this is due to how the magnets are mounted hidden in the spindle. There may yet be a way of servicing these, but the documentation is mum about it.

Look’s Geo Trekking Roc SPD+flat urban pedals, with one optional Vision LED light mounted.
Credit: JensonUSA.

One major difference between the Arclight pedals and Look’s Geo Trekking counterparts is that the latter is a clipless+flat pedal combo, much like Shimano’s Deore XT PD-T780. While I’d love to see an SPD-style version of Arclight, this may be difficult to pull off in practice, due to how the light modules and pedals are apparently designed from the ground up as a flat pedal system first and foremost. A theoretical SPD-style version would need to add at least 30 mm to the length of the pedal body, I reckon.

I haven’t yet mounted the Arclight system onto any of my bikes. It seems Bino, my folding bike, is a good candidate, as I use him mainly for running errands. It will be interesting to see how the whole system stands up to real-world use and abuse. Stay tuned and watch this space.

Redshift Sports ShockStop seatpost breaks cover on Kickstarter

Over the four installments of the deflection diaries, I’ve shared my experience with Redshift Sports’ ShockStop suspension stem, and it’s been quite favorable for the most part. The inherent limitation of the design, though, is that it’s a stem – it will only ever offer suspension at the front of the bike.

The boffins at Redshift Sports have taken notice, and listened to the demand for a counterpart solution to tame bucking at the rear end. They came out with the ShockStop suspension seatpost, which they told me about a few days in advance of today’s launch. They were nice enough to send me photos to share with you, too.

Rear view of the ShockStop seatpost, showing a bit more insight into the pivot mechanism.


Baking suspension into a seatpost isn’t a new concept, judging from the many designs that have come before. Perhaps the most popular example is Cane Creek’s Thudbuster, based around a mechanical parallelogram linkage damped by an elastomer.

Another school of thought takes advantage of the benefits of carbon fiber composite as a material. Hyro’s own carbon composite seatpost is a Giant D-Fuse type, the flat rear side shaped to promote flexion. Perhaps Canyon’s VCLS 1.0 and 2.0 seatposts, based on an Ergon design, are the modern poster children for this. This design basically splits the seatpost into two pieces, joined at the saddle clamp and at the other end, turning the entire assembly into a leaf spring and offering greater deflection.

Redshift takes the basic design concept of their own ShockStop stem and this time applies it to the seatpost. As before, there is a mechanical pivot providing the motion, and there is a damper controlling and keeping unwanted motion to a minimum. In this case, instead of resorting to elastomers, the damping comes courtesy of a selection of coil springs of different stiffnesses, hidden within the seatpost itself, which the user can swap out for ride and sag tuning. In this particular aspect, it’s similar to the Specialized FutureShock suspension cartridge for steerer tubes, which ships with three coil spring options for tuning.

Installed on an older Specialized Roubaix endurance road bike.

Similar to the ShockStop stem, the hardware here is hidden in a rather standard, round aluminum seatpost 27.2 mm in diameter, which means if your bike has a round seat tube accepting a seatpost at least that thick, it can mount right in. For bikes made around bigger seatposts, Redshift provides shims to make up the difference.

Installed on a Niner RLT9 gravel bike. The original aluminum RLT9 used to draw flak for flinty ride quality, so the ShockStop seatpost might be a good fit.


By now, I’m sure you’ve heard of the many horror stories of projects that have resorted to Kickstarter or some other crowdfunding scheme…only to underwhelm with the finished product, or worse, not deliver at all and run off with the raised funds. So far, though, Redshift Sports has had a consistent track record of delivering on what they say. Their previous products, the ShockStop stem and the Switch Aero System, both began life as Kickstarter projects, were successfully crowdfunded, and are now both available at regular retail (which was how I got my stem).

It’s no surprise, then, that they’ve resorted to crowdfunding for this third go-around with the ShockStop seatpost. You can head down to their Kickstarter campaign page for more details. One interesting detail is that they’re offering backers a bundle where both ShockStop stem and seatpost are included – a “ShockStop system” if you will.

Fitted to a Gazelle Cittzen – a flat-handlebar commuter E-bike of the pedal-assist persuasion.

The ShockStop system – stem and seatpost – fitted to a Gary Fisher hybrid commuter bike.


Hyro’s seatpost has a D-shaped profile, effectively rendering both it and the TCX seat tube as proprietary parts.

As this is a round 27.2 mm diameter seatpost, I can’t really take advantage of this design unless I get myself another bike. Hyro’s seat tube is specifically shaped to accept Giant’s proprietary D-Fuse seatposts, and Bino’s seatpost, while still round, is a comparatively massive, oversized 33.9 mm diameter common with Dahon and Tern folding bikes. Seeing video of the ShockStop seatpost in motion, it does look much more effective in providing deflection than Hyro’s D-Fuse seatpost.


  • 27.2 mm external diameter; shims available for larger seat tube diameters
  • 6061 aluminum alloy, 3D forged and CNC machined, finished in anodized black
  • 35 mm of suspension travel
  • Rearward offset range: 0-22 mm; 10 mm at 25% sag
  • Length: 350 mm
  • Weight: 497 g