Hi , when i choose my first bike i which i have £250-350 to spend , i see that most bikes in tht range dont come with the silver disk on the front tyre and sometimes the back, but the £350+ bikes do , is this essential and whats the difference? Also what bikes do you recommend to get , and please dont say ebay because iv checked for 2 weeks and theirs rarely bikes which people are willing to deliver, and the pickups are usually 5+ hours away. Im looking for a 20 as i have heard its best for learning on Thanks edit: just found a onza t comp 2008 on ebay , reckon its any good? it dont have the 2 disks either ? http://cgi.ebay.co.uk/ws/eBayISAPI.dll?Vie...n%3D3%26ps%3D56