NiteRider’s warranty replacement for the wayward Solas 2W comes as the updated Solas 30 also with an output of 30 lumens. It shines well in a direct comparison with the Knog Blinder Road R70. Continue reading
This is a mini-review of taillights limited to a comparison of the two I’ve used plus a new addition. Of paramount importance is the brightness to alert distant drivers. Continue reading
The Topeak Mini 9, a tiny 2.5 x 1 x 0.75 inches and a mere 92 g, carries big function – once you dig around your jersey pocket and manage to find it.
It has the major Allen wrenches (2 to 8 mm) for your bike, pedals, and cleats, along with Phillips and Torx T25 heads. This big investment for self-sufficiency on the road has a small list price of $17.
The admittedly simplistic hypothetical approximation used in the previous post has been borne out by experimental data showing that a 25-mm tire bears about 10% less rolling resistance than a 23-mm tire, when both are inflated to the same pressure from 90 to 120 psi, a common range used by many riders. Continue reading
There’s a move to wider 25-mm tires in the pro peloton and in the streets as well for the advantage of lower rolling resistance compared to the commonly used widths up to 23 mm. This difference in rolling resistance and thus gain in speed is obtained when different sizes are tested at equivalent tire pressure, a condition in which the narrow and wide tires produce contact areas (with the road) that are the same but of different shapes. Continue reading
ProBikeKit aficionados will know about the 24-h sale on Conti GP 4000S that brings the price down to $31 if you buy two (generally needed for two wheels), and $31 for four. Those using the more expensive Conti Gatorskins may want to consider switching – the GP4kS is pretty tough. (This is not the new multicolour model I mentioned previously – however, the sale may be to clear out stock for the new one.)