Category Archives: Bike Tech

Product Review | RaceDots

The search for every little edge to improve our riding leads to some strange places. After finally getting myself a cool solution to my long vexing search for a bike race number holder, I recently found myself sucked into the dark and murky world of jersey numbers. Safety pins are last centuries news and I wanted something more hi-tech. And pink.

A bit of Googling, 7 days of waiting and I was the proud owner of a set of RaceDots. Just in time for some battle testing in the 40 degree heat of Thailands Tour of Friendship.

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RaceDots are designed to hold your number in place on your jersey – mostly for cycling but I’m sure they’d do great for that evil running thing too. They’re basically superstrong magnets that come in 2 parts and safely secure the jersey between them – doing away with faffing around with pins and making holes in the jersey pockets.

Upon arrival, the first thing that struck me was the strength of the magnets. Even getting them to separate from the packaging was pretty hard. I have no doubt that if you ever have urgent need to wipe a hard drive Jason Bourne style or need to quickly destroy some adult material before mum uses the computer, the Race dots could certainly do the job. This might be an issue if you keep a phone or credit card in the back pocket too…

I must say say they looked pretty cool. Multiple colors were available to ensure you get something matching your kit or bike. They were a bit heavy though so avoid if you’re a total weight weenie.

Attaching them and getting the number smooth and positioned right was a doddle. It looked pro and saved me endless amounts (well 5 minutes) of pinning and unpinning my numbers each night. That was welcomed as I was a total washout after every stage with fingers that felt like Monster Munch crisps.

Despite the nuclear powered magnets inside, they didn’t seem to do the job as I’d expect and i always seemed to have at least one flappy number corner by the end of each stage.

imageOverall, they’re a good novelty. Not worth the $50 including shipping but worth getting if you’ve bought everything else on Wiggle and absolutely, positively have to buy something.

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Dark soya sauce and the Art of Chain-lube Maintenance

Steven Wong

Some time ago Velo magazine published an interesting article on the merits of various chain lubricants.  This is something of an arcane science but in the interests of extracting every single wheel-sucking watt of performance from my ageing pins, I was keen to try and put into practice some of its recommendations.

sauce2

The tests that Velo commissioned tried to answer one simple question…which chain lube makes you fastest on race day?

The answer my friend, is blowing in the wind (well, sort of…)

In summary, there is a plethora of lubricants available and they are generally classified into dry, light, heavy, greasy or sprays.  No doubt some sprays are light and some greasy stuff is heavy, etc (I’m sure the available literature on lubricants includes some Ph.D work on exactly how a lubricant is classified) but for most of us weekend warriors, we just need a simple solution that is relatively easy to apply, stops the squeaking and minimises frictional losses in the transmission system (that’s an engineer’s techo-jargon for ‘bike chain’).

After Velo put some 30 different products through their paces on a test rig that involved whirling wheels, strain gauges and a digital output – the whole thing apparently being accurate to 0.02 watt (in other words the difference between a sub-3:00 minute SBV or not) – a clear winner emerged.

For all the science that lube boffins have come up with, the No. 1 performing chain lubricant is…paraffin wax.  Yes, paraffin wax.  The kind of stuff that keeps the place illuminated if you suffer from ‘brownouts’ and is sometimes applied to surfboards and as a protective coating to hard cheeses.

In a test for efficiency, paraffin wax vanquished all other chain lubes tested, besting its closest rival by 0.24 watts and the worst by over 3.0 watts in ideal conditions.  In a wet, dirty environment its performance was even more impressive with a 6.0-watt improvement over the worst performing alternative.

For serious amateurs whose credit cards are maxed out on bike debt, paraffin wax is perhaps the cheapest way to gain speed.

Having said all of that, there are a couple of drawbacks.  Firstly, the application process is tedious.  It involves a thorough cleaning of the chain in a light solvent, followed by immersion in melted wax for a few minutes.

sauce3 The wax ready to be melted in a crockpot

The saving grace is that you can do a batch of chains to last a few months before wheeling out the crock pot again.

But how long does it last?  In my experience, we’re talking something in the order of 500km of efficient, super-dry and super-clean operation.  However, when the lubricating properties of the wax finally run out, you’ll know about it in an instant.  One moment silent, smooth action, the next, every roller in the chain is squeaking its lungs out.

That brings me to the second – and more tasty – part of this article.  That is exactly that happened to me a couple of months ago…I set off for Food Canopy one Saturday morning in quiet contemplation and arrived to the cacophonus discord of dry metal-on-metal rubbing.

sauce4 Don’t be fooled…only the one in the middle (‘Tiger’ brand Dark Soya Sauce) is the real deal.  The tiny bottle with the white cap is my emergency back up kept under the saddle.

Desperate for a solution, I looked around for some cooking oil without any success.  What I did find however, was some thick black soya sauce on one of the stall counters…yes, the sort used in ‘char kway teow’ and sometimes on chicken rice.  Not the light soy, but the thick, viscous, dark stuff.

Once applied, the sauce sticks like the proverbial ‘sh…’ and quiet harmony is once again restored.

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Over-liberal application of dark soya sauce…but easily cleaned up

To be fair, it’s early days yet and I don’t know what the frictional losses of dark sauce are but so far, the soya solution seems to be working well albeit on a paraffin-waxed chain that has well-exceeded 500km.  The next stage is to try it on a non-waxed chain to see how well it stacks up.

For the moment, it does offer some compelling advantages over conventional oil-based solutions:

  •  – it doesn’t seem to pick up the kind of sludge the oiled chains do;
  •  – it takes 15 seconds to wash off with a garden hose.  Once dry, reapply;
  •  – a $2.50 bottle should last forever;
  •  – excess sauce can always be wiped off the chain with a slice of white bread and offered to your main competitor in the feed zone as an extra ‘Vegemite’ sandwich surplus to your needs.

Dark soya sauce does however, have an obvious drawback which is that in wet riding conditions, it is soluble.  The glib solution to this is not to ride in the rain but of course, that can’t always be avoided.

For those interested in more detail and hard, scientific numbers, a copy of the original Velo article is appended in pdf format.

Click to see the article
Click to see the article