Déjà Vu, All Over Again

Once again, I’ve decided that cantilever brakes and me are not BFFs.  Last October, I wrote about converting my SOMA Saga’s cantilevers to v-brakes.  This week, I swore off cantilevers for good, and converted my Rawland rSogn to mini v-brakes.

Both my rSogn and Salsa Vaya are equipped with Campagnolo Centaur Ergopower integrated brake/shift levers.  The Campy levers are designed to be used with the company’s dual pivot sidepull brakes, and as such, they don’t pull as much cable as those levers designed specifically for linear pull brakes.  Since I didn’t want to give up my Ergopower levers, I would be limited to shorter, “mini” v-brakes for this conversion.

Because of their compatibility with integrated brake/shift levers, mini v-brakes are popular with cyclo-cross racers, tandem riders, and they can even be found on some touring bikes. Choosing the correct caliper length depends on many variables, but the general rule is that longer brakes offer more mechanical advantage (and vertical clearance), but at the expense of pad-to-rim clearance.  After measuring the Rawland’s tire clearance, I decided on an 85mm brake.

Tektro produces v-brakes that range from 80mm to 110mm in length.  Their RX5 model features 85mm arms, cartridge-style pads, and is available in silver or black finishes.  The company claims a weight of 148g per-brake (one wheel’s worth), but with mounting hardware, cable noodle, and pads, mine weighed 175g each.  With a street price of less than $20/wheel, the difference in weight wasn’t a deal breaker.

Tektro RX5 brake on the author’s Rawland rSogn.

Setting up v-brakes is absurdly easy–especially compared to cantilevers.  Position the pads so that the arms are roughly parallel to the rims with the brakes engaged, cable ’em up, and you’re good to go.  I ended up having to add two short sections of cable housing and in-line adjusters,  but this was expected as I was re-using portions of the previous brakes’ housings.  To eliminate any variations in performance due to different pad compounds, I installed the RX5s with Yokozuna salmon pads.

One ride with the new brakes was all it took to know that I’d made the right choice.  Power and modulation were noticeably better with the linear-pull Tektros.  Braking from the hoods was as good as any dual pivot sidepull, and pleasantly absent were the judder and squeal that were so prevalent with the cantilevers.  While some riders complain that v-brakes sometimes have a touchy, on/off feel, I found that the RX5s provided excellent feedback and control.

Clearance is approximately 10mm between the top of the 650x38B tire and brake cable.

Sharp-eyed readers will notice that the brake pads are positioned close to the rim (compared to cantilevers).  This is necessary because modern drop-bar levers/shifters have a higher mechanical advantage than flat-bar levers (which pull more cable).  This can potentially be an issue if your wheel goes out of true (or you ride in muddy conditions).  For me, though, the (minor) potential for pad rub is more than offset by the increased braking power and modulation.

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