Tang Went into a Bicycle Shop to Purchase a Bike

Tang went into a bicycle shop to purchase a bike rack.He asked the salesperson for help in picking out a rack that would fit his bike.While the salesperson was helping another customer,Tang went ahead and chose one he wanted.The salesperson then told Tang that the rack was a good one.After Tang put the rack on his bike,it did not fit properly and damaged his gear shift.Explain whether Tang can rightfully claim that the salesperson committed a breach of warranty of fitness for a particular purpose.