Cur­va­ceous num­ber from Wales

Urban Cyclist - - Bespoked -

Paulus Quiros is a part­ner­ship be­tween Jonathan Paulus and José Quiros, who de­sign and build hand­made steel bikes from their work­shop in Swansea. A sig­na­ture fea­ture of the team’s hand­i­work is a hand­crafted steel plate be­tween the seat­stays and top tube, but it’s the cur­va­ceous ge­om­e­try on their sin­gle­speed that at­tracted at­ten­tion at Bespoked. “When we first showed this to cy­clists, many thought it would feel re­ally rigid up­front,” says Paulus. “But ac­tu­ally that shape moves the stress to mid-tube in a rather pre­dictable man­ner. In a me­taphor­i­cal way, it’s al­most like you enjoy a touch more flex­i­bil­ity in the mid­dle of the down­tube for added com­fort. Ul­ti­mately, this shape max­imises power trans­fer, al­beit de­spite the stand­out tub­ing, key is that you get the di­men­sions of the seat­tube right. That knits things to­gether.” The ‘Pike’ de­sign’s con­structed from Reynolds 853 dou­ble-butted steel and 4130 aero­space chrome-molyb­de­num tub­ing. Beau­ti­ful tig weld­ing melds things to­gether, al­though Paulus Quiros are also adept at fil­let and lug braz­ing. The el­e­gant crankset’s sup­plied by Cam­pag­nolo, specif­i­cally from their lauded Record range. Paulus Quiros also show­cased a bike they’d de­signed and built for en­durance cy­clist Do­minic Irvine, with the unique aero 29er re­quired to with­stand the pun­ish­ment of a cy­clist who of­ten racks up over a thou­sand miles of rid­ing each week. “That’s why we used Reynolds 953,” Paulus ex­plains of the bike that’s no­table for a fork that pro­pels for­ward acutely be­fore be­com­ing shal­lower half­way down. “You can’t main­tain a TT po­si­tion on a tra­di­tional 29er be­cause it would be­have ter­ri­bly,” he adds. “So the ge­om­e­try’s com­pletely changed.” There’s great footage on YouTube of Dom test­ing the bike in Afan For­est.

“The shape of the tub­ing re­li­ably trans­fers the stress from rid­ing to mid- tube in a pre­dictable man­ner”

Seam­less hor­i­zon­tal dropouts highlight the devil in the de­tail

MI DD L E You’d think that tub­ing would be too rigid but it trans­fers stress well

R IG H T Cam­pagonolo’s Record crankset is an el­e­gant beast, be­fit­ting of a hand­made bike

Newspapers in English

Newspapers from Australia

© PressReader. All rights reserved.