Lightweight tent recommendations?

if you were touring by bicycle would it be a good idea to bring your bike inside the tent for security? would this then require a massive tent? are there tents specifically designed for cycle touring?

yes, there are! they range from the single berth one Nhattack posted to offerings by established manufacturers like MSR, or Wild Country, a sub-division of T-N.

I like to wild/stealth camp. when in urban areas or s24o's, l cover the bike in a tarp. if really dodgy area, l can just manage to fit the bike in but have to take both wheels of. in another thread, theres a motorbike disc lock with a motion alarm which l might try in future.