Reflective Paint - the Ultimate in Hi-Vis?

image via BikeSafeBoston

I've been documenting the making of a new bike for Josh Zisson of Bike Safe Boston, and he has this crazy idea to make the entire bicycle reflective - as in tire sidewalls, wheel rims and even the frame itself. Apparently there is a paint and powdercoating company in Indianapolis called Halo Coatings and they've developed a way to add an ingredient to powdercoat that would make it reflective under direct light ("halo patented retro-reflective powder coating"). I had a hard time believing this until I saw it in person. The orange paint chip above would be the colour used on his wheel rims. And watch what happens to it when it's photographed with flash:

image viaBikeSafeBoston

Neat, isn't it? Examining the colour chip up close, it's got these tiny mirror-like particles embedded in the powdercoat and they create the reflective effect. The technology is very new, and so far there is only one bicycle I know of that it's been used on - a cargo bike by Tsunehiro Cycles that won 2nd place at the Oregon Manifest last year. Here is what that bike looks like in the dark. The potential of this product is exciting - though personally I can't decide whether reflective paint is a genius idea for city bikes, or whether it's sensory overload. I would need to see it in person I guess. What do you think - would you want a reflective bike?

A Subtle Surprise: Brooks Cambium C-17

Earlier this year Brooks surprised their fans by announcing the release of a non-leather saddle: theCambium C-17. Selected to be one of the beta-testers, I must have been in the very last wave of recipients, because the saddles have been out for months now and mine arrived only last week. About to head back to Ireland, I threw it in a suitcase and, after several days of jetlag, have now finally managed to get a good look. I have not tried the Cambium on a bike yet, but wanted to post some shots and first impressions, figuring many of you are as curious as I was. And there is good reason to be curious: The Cambium is quite a departure for Brooks of England - a storied manufacturer whose very claim to fame is its leather saddles.






As Brook describes it, the Cambium C-17 is made "from vulcanized natural rubber and organic cotton enhanced by a thin layer of structural textile for added resilience." Considering this is a bike saddle, I'd assumed the fabric would be treated with something to make the surface smooth. But the surface has a distinct texture to it similar to that of artist's canvas or some types of denim. While it's been treated for stiffness and waterproofing, there remains a bit of tooth to it. For that reason I have to admit, I am reluctant to try this saddle with lycra cycling shorts - which can be delicate and abrasion-prone in the seat area. But I'll do it, and will let you know how it goes.






As far as looks, the one word that comes to mind in describing the Cambium is "subtle." This is a minimalist, low key saddle, not an ostentatious one. The colour of the cloth is half way between gray and taupe. In person, it can look either charcoal gray, ashy brown or even mauve, depending on what it's placed next to. This is rather nice, in the sense that it will match pretty much any bike. The brooks logo is stamped tone on tone into the rear of the undercarriage and is only noticeable close-up. The metal bits are matte, almost dull. The overall shape is somewhere between a Brooks B-17 and an '80s style vinyl racing saddle.




While the Cambium's "C-17" label suggests it has the same dimensions as the B-17 touring saddle, this is not the case: The C-17 is narrower (162mm across, compared to the B-17's 175mm), longer (283mm, compared to the B-17's 275mm), and has less height to it (52mm, compared to the B-17's 65mm). The Cambium should be suitable for a more aggressive bike position than the B-17. The weight of the Cambium is 415g (compared to 520g of the standard B-17). The ladies' version - the C-17S - is the same as the C17 in every way, except 18mm shorter and 10g lighter.






I did not receive any special insight into the Cambium's construction from Brooks, so I am just describing what I see. It looks like the undercarriage is modular, similar to Berthoud, with (rivet-shaped) screws instead of rivets.






The matte metal resembles titanium, but it is not labeled or described as such, so I assume it is cro-moly.






Stamped "natural rubber vulcanized in Italy," the saddle is extremely flexible - I can easily bend and twist it with my hands. I imagine Brooks was trying to replicate the hammocking/ suspension qualities inherent to their leather saddles, and this was the solution they came up with. I am eager to experience the feel of this on a bike - especially on bumpy roads, chipseal and gravel.





The surface layer of cotton fabric is cut to form and glued onto the rubber. While the construction looks to be top notch, one potential problem I can see, is that over time the edges might begin to lift. Only long term use can determine whether this proves to be the case.



As I see it, the potential appeal of this saddle is two-fold: Those who do not use leather for ethical reasons will welcome a non-leather option from Brooks. And those who dislike how much Brooks leather saddles change shape over time might prefer the stability of the Cambium's construction.It is also interesting how Brooks went with natural, rather than synthetic materials in constructing this saddle, in keeping with its usual aesthetics. The C-17 will look good on a wide range of bikes, classic and modern.



Well, that is all for now. I am going to try this saddle on a semi-upright pathrace-style bike, then on my roadbike, and report back in a couple of weeks. If you have any questions in the meantime about the construction, shape or aesthetics, feel free to ask. In fairness to Brooks, I would like to note that I was not asked to write about the saddle on this blog or to publicise it in any way; my role as a beta-tester involves only private feedback. I believe the Cambium C-17 and C-17S will be available for sale in September, as a limited edition release. You can see its full specs, as well as read feedback from those who were in the earlier waves of testers, here.

Las Trampas Cascade

Cascade, Las Trampas, originally uploaded by ParsecTraveller.

One of the multiple cascades to be found along an unnamed creek in Las Trampas. There are still colorful red leaves on the ground from fall...and spring is here!

Sunset Park

Very short wander to this viewpoint

Straight down to the water

From a little higher

Manhattan in the misty distance

A local denizen

Tuffee & Spanky

Tuffee and her friend Spanky playing their game of race along the fence.

Beer Mug Balloon

5-Speed Conversion!

My conversion of the Mercier mixte to a 5-speed is pretty much complete, and it worked out nicely. I've received some questions about the process since I first mentioned my plan to do this, so I include answers to these questions here.

What is a 5-Speed Conversion?
A 5-speed conversion refers to transforming a vintage 10-speed bicycle into a 5-speed by removing one of the two front chainrings and the front derailleur system (see before and after pictures above). In the end, the bicycle is left with a much simpler set-up of 5 chainrings in the rear, 1 chainring in the front, and a single gear shifter. It works much the same as a 5-speed hub, only the gears are visible rather than hidden inside the hub.

Why do this? Doesn't it mean you have fewer speeds now?
Hard question to answer, but I will try: The advantage of a derailleur over an internal hub, is that it allows for much wider spaced gearing. Riding the Mercier around hilly areas, I can get by perfectly well with just the middle 3 rear gears. The 2 extra rear chainrings provide a nice "just in case" buffer of one higher and one lower gear than I'd ever need, but the second front ring (which provides 5 additional speeds) and the whole front derailleur system (which switches between the two front rings) are useless entirely in the context of where and how I plan to ride this bike. Given my certainty of this, converting it to a 5-speed made sense, because it would simplify the handling of the bicycle and it would get rid of extraneous components. Also, this bike (as many older French bicycles) was originally designed to have a rear-only derailleur system. This is evident, because it has a braze-on (on the downtube) for just a single gear shifter. So converting it to a 5-speed reverts to a traditional design.

If you're going to make it a 5-speed, why not use a 5-speed hub and ditch the derailleur system all together?
The main reason, is that no existing 5-speed hub could give me the same customised, wide spacing as a 5-speed rear derailleur. It's not just about how many speeds you have, but how useful each of those speeds are. Additionally, it would cost a ton of money to rebuild the rear wheel with a 5-speed hub, whereas the 5-speed derailleur conversion was inexpensive. And finally, I am trying to keep this bicycle fitted with traditional components, and French bicycles were traditionally fitted with derailleurs.

How was the conversion done?
Keeping in mind that the process will differ depending on your current set-up, here is what generally needs to be done, step-by-step:

1. Front chainring removal
Since you will only have one chainring in the front now, you need to figure out how to get rid of the second one. The main issue here has to do with how the crank arm is attached to the ring(s). On some bicycles, it is possible to simply remove the extraneous chainring and the remaining chainring will hold up the crank. On my Mercier, the two rings are a unit, attached to the crank via a proprietary bolt system. To make a long story short, we could not simply remove the extra ring. Rather than get an entire new chainring and crank system, it occured to me that perhaps the teeth on the bigger chainring could be filed off - turning the ring into a chainguard. I discussed the idea with metalworker and bicycle mechanic Jon Gehman, who is a reader of this blog, and he agreed that this was a good way to go. I then sent him the chainring for a "de-toothing" service, and he did a spectacular job.

Here is a close-up of what was formerly the larger chainring. Notice how beautifully the edge is done - giving it a professionally finished look.

2. Front derailleur removal
This was the easiest part. The Simplex front derailleur simply unbolts and removes. On the picture above you can see that the rainbow decal is a little worn where it used to be, but that is all.

3. Changing the shifters
The ease or difficulty of this step depends entirely on what sort of shifters you have to begin with. If your bicycle has separate (unconnected) shifters for the rear and front derailleurs, then you simply remove the one that controls the front and you are done. If your shifters are a unit, then you will have to remove them and install a single shifter instead. Above is a vintage Huret single shifter for mounting on the stem that I bought for this purpose. It's beautiful, "period-correct", and can be bought fairly inexpensively. The Co-Habitant installed the shifter and connected the cable to the derailleur.

Here is the Huret shifter installed on the stem. I am not 100% sure though that this is the ultimate solution. Originally, the Mercier had downtube shifters, and this is where the single braze-on is located. However, I do not understand how one is supposed to use downtube shifters on a near-upright bicycle. At least for me, and in traffic, they were too much to handle - especially given that the shifting has to be done with the right hand.

So now there is a cable stopper where the downtube braze-on is, and the cable then extends further to the stem. Though the Huret shifter is beautiful on its own, I am not sure how fitting it is here. For instance, the reason it is not all the way at the bottom of the stem, is that placing it here makes it hit the handlebar when it is moved all the way forward. Hmm, right? Your thoughts on this welcome.

Overall I am thrilled with the 5-speed conversion. The Mercier is light, easier than ever to handle, and now ready for its fate as Studio Bike. I admit that I am reluctant to send it over to the Studio and quite like having it here at home. But I also look forward to exploring a new neighborhood together... and to having less bike clutter in our apartment!