Custom cassettes

[theosaurus]

I am currenly in the youth catergory of racing which means i need a 52 chainring and 16 up cassette, as my maximum gear ratio. At the moment i'm using a miche 16-26 cassete which weighs 450g. this is wat to heavy does anyone have any lighter suggestions? maybe doing some custom cassettes or combining cassettes?
i run campag 10 speed

[ave]

You can use a smaller chainring and smaller sprockets, can't you?

[BackRoadsBiker]

I would recommend going the smaller chainring route. That's what I did in my junior racing days, and it really simplifies everything. Calculate your gear inches and have a shop order you an appropriate ring setup.

[brearley]

if i remember correctly i used a 40 ring with a straight through 12-21 cassette as a youth
52x16 is the same as 39x12 so the 40 will give you a slightly larger gear too

[maley]

From memory, my son ran a 53x14 using attack/force which was bang on the restriction.
edit: Just re-read the op, my apologies this was as a junior.

[theosaurus]

thanks guys,
but i forgot to add that i have already used the small chainring system. i need the large cassette because the spare wheels in a race are all 16 up