Second Hand Challenge Bikes

An example of this is the Challenge 26" Folding Trekking Bike. Handy and practical, this unisex model would be great for exploring and taking away on holiday. The tough steel frame is durable and a smooth ride is assured with an 18-gear shift and front suspension. Sunrun gears and rear derailleur are reliable and with a total weight of just 16.5kg, it is easy to fold away and carry when needs be.
Second hand Challenge bikes come in all shapes and sizes. If you wanted to get a feel for mountain biking then choosing an entry-level bike from Challenge would be an excellent and inexpensive option. You shouldn't expect high-end specifications and the latest cutting edge technology, but with 18 gears, from Power SFT and Power RD rear derailleur, front and rear V-type brakes and standard 26" wheels, the spec is functional and more than adequate. The Emulator is a good example of how second hand Challenge bikes serve as excellent entry-level bikes.
You might want to upgrade after a time, but to try out a new discipline to see if you get the bug, used Challenge bikes are a good starting point.