The old name is Seng Chu Hin Bicycle shop, it is at Tampines Street 22. It carries these in stocks:
F.u.n.n.
Hayes
da bomb
Cannondale
Specialized
Progear
Giant
Scott
Shimano
I can recommend you Cheap John, located along Sembawang Road just next to Sembawang Shopping Centre. They sell variety of bikes, spare parts, accessories.