Proofread the following article and correct its four subject-verb disagreements. PaulSmith'sCyclewearCollectionisLaunched Asateenager,SirPaulSmith,nowoneofBritain’sbest-knownfashiondesigners,wereontrackforaverydifferentcareer.Apromisingyoungathlete,heheldambitionsofbeingaprofessionalcyclist,butitwasn'ttobe.Afterleavingschoolat15withnoqualifications,heearnedhismoneyasanerrandboyataclotheswarehouse,relishinghiscommuteandidolisingsuchcyclinggreatsasTommySimpson.Butaseriouscaraccidentatage17puthiminhospitalforsixmonthsandhisdreamswasallbutover... Namedafterabrandofsteel-alloytubing,the531collectionofjackets,jerseysandshortsareunderstated,buttechnicallyoutstanding,andinlinewiththeideathatcyclistsneedn'tsacrificetheirpersonalstyleforthesakeofthecommute. DominantmaterialsincludeVentilecottonandMerinowool,whichoffersbreathabilityanddurability,andtherearesmartdesignfeaturesthroughout,suchasreflectivepanels,retractable“splashguards”andrubberisedhems.

As a teenager, Sir Paul Smith, now one of Britain’s best-known fashion designers, was on track for a very different career. A promising young athlete, he held ambitions of being a professional cyclist, but it wasn't to be. After leaving school at 15 with no qualifications, he earned his money as an errand boy at a clothes warehouse, relishing his commute and idolizing such cycling greats as Tommy Simpson. But a serious car accident at age 17 put him in a hospital for six months and his dreams were all but over...

Named after a brand of steel alloy tubing, the 531 collection of jackets, jerseys, and shorts is understated but technically outstanding, and in line with the idea that cyclists needn't sacrifice their personal style for the sake of the commute.

Dominant materials include Ventile cotton and Merino wool, which offer breathability and durability, and there are smart design features throughout, such as reflective panels, retractable “splash guards” and rubberised hems.