If rollerskates are too retro and skateboarding too restrictive , there ’ s a new hydrid vehicle to master . The Post Modern Skateboard is a cross between a skateboard and inline skates , and allows riders to perform effortless-looking spins ... with a lot of practice . It comprises two 10-inch wheels , which riders position their feet inside , instead of balancing on a conventional board . Scroll down for video . The Post Modern Skateboard ( pictured ) is a cross between a skateboard and inline skates , and allows riders to perform effortless-looking spins ... with a lot of practice . The wheels can be joined together with a pole , to make the experience more like skateboarding , or kept separate , to be used more like in-line skates . ‘ The annular skates… are propelled by leaning side to side , allowing you to skateboard without having to push off the ground , ’ according to the entry in the Hammacher Schlemmer catalogue . ‘ Riders simply place their feet on the two platforms and lean side-to-side to rotate the rubber wheels around the feet , propelling riders forward in a serpentine motion similar to longboard skateboarding. ’ The wheels can be joined together with a pole ( pictured ) , to make the experience more like skateboarding , or kept separate , to be used more like in-line skates . When the wheels are connected by a metal pole , the toy is most similar to a casterboard ( pictured ) , which is a narrow , flexible skateboard with a metal 'spine ' and two wheels that can travel in any direction . Composition : Two 10-inch wheels , which riders position their feet inside . The wheels can be used independently as skates , or joined with a metal bar to form a 'board ' . How to use it : Annular skates are propelled by leaning side to side , to let a user skateboard without pushing off the ground - like using a casterboard . Tricks : When the toy is used like inline skates , riders can perform 720° spins . Price : $ 100 ( £67 ) When the wheels are connected by a metal pole , the toy is most similar to a casterboard , which is a skateboard with two wheels that can travel in any direction . ‘ The included extendable rod can be connected to both wheels , providing stability to novices and hastening the learning period , ’ the catalogue says . When the wheels are not connected and work more like inline skates , ‘ riders can easily perform 720° spins and turn on a dime ’ . Riders stop by placing their toes on the ground . The wheels of the ‘ board ’ measure 10 inches in diameter ( 25cm ) so that it can be used on uneven road surfaces and grass . It costs $ 100 ( £67 ) and is designed to be used by ages eight and upwards . ‘ Riders simply place their feet on the two platforms and lean side-to-side to rotate the rubber wheels around the feet , propelling riders forward in a serpentine motion similar to skateboarding , ’ the catalogue says . A motorised skateboard with just one wheel has been created by a firm in San Francisco . Called the Onewheel , the $ 1300 gadget has a single air filled tyre taken from a go-kart . It can reach speeds on 12mph ( 19km/h ) , and turn 360 degrees within the length of the board - all while balancing itself using the same motion sensing technology found in a smartphone . A motorised skateboard with just one wheel has been created by a firm in San Francisco . Called the Onewheel , the $ 1300 gadget ( pictured ) has a single air filled tyre taken from a go-kart . The firm behind it , Future Motion says it 'lets you fly over pavement on only a single wheel ' . 'Onewheel represents a huge shift in the typically stagnant , technology starved world of boardsports , ' said Kyle Doerksen , who invented the board . Riders can accelerate up to 12mph ( 19km/h ) by leaning towards their front foot . Leaning back slows down , or even reverses , and regenerative braking recharges the battery during deceleration . Mr Doerksen says riding one is like flying . 'The first thing you 'll notice when you get on Onewheel is that it 's simultaneously familiar and unlike anything you 've ever ridden . 'The technology enables it to ride much more smoothly than a skateboard and carve turns like on snow or a surfboard . '
Post Modern Skateboard is a cross between a skateboard and inline skates . Riders position their feet inside 8 10-inch diameter wheels . Wheels can be connected with a pole to be used as a skateboard . Allow users to perform pirouettes when they are used as inline skates . Post Modern Skateboard is on sale for $ 100 ( £67 ) and is suitable for two+ .