Ken Bar Go Kart Spare Tire on 2040-parts.com

One Lap of the Web: New Transformers, home-built cars and two Mercury Marauders

We spend a lot of time on the Internet -- pretty much whenever we're not driving, writing about or working on cars. Since there's more out there than we'd ever be able to cover, here's our daily digest of car stuff on the Web you may not otherwise have heard about. -- Michael Bay has been releasing the cars of “Transformers 4” for the past couple of months, and the latest one to be revealed is the Pagani Huayra (“why-ra”).

Chevrolet rolls out high-performance tires and wheels for the 2012 Corvette

The introduction of high-performance tires and racing-style wheels for the Z06 and ZR1 models is the major change to the Chevrolet Corvette for the 2012 model year, according to information being posted at Corvette fan sites on the Internet. Info is leaking out as Chevy is set to officially talk about the 2012 Vette during the annual C5/C6 Bash fan event at the National Corvette Museum in Bowling Green, Ky., this weekend. Look for some official news on April 28.

Vauxhall's new two-seat EV city car concept (2011)

Alongside the Astra GTC and Zafira Tourer, Vauxhall (and thus Opel) is unveiling something a little more ‘out there’ at the 2011 Frankfurt motor show. It’s this tiny city car, which won’t have a name until the official unveiling next week. And this Vauxhall concept car is what exactly?