A bike comprising: • a rear wheel, • a low travel rear wheel suspension system, the low travel rear wheel suspension system comprising: • a seat tube, • a left side flexible chainstay and a right side flexible chainstay, each with its front end attached to the seat tube of said bike less than 250mm from the rotational axis of a bottom bracket shell of said bike, said bottom bracket shell defined to be a part of said seat tube, • a left side seatstay and a right side seatstay, each having its lower end areas connected to the posterior end areas of each of said flexible chainstays (102, 103), and each of said seatstays (107, 108) extending upwards and forward with its other end connecting to the seat tube of said bike, • in the area where said flexible chainstays (102, 103) and said seatstays (107, 108) connect, a set of dropouts to rotably connect to a rear wheel of said bike, said dropouts can be integral parts of said flexible chainstays and/or said seatstays, or they can be mounted to said flexible chainstays and/or said seatstays through any release fastening elements, characterised in that • in the area of said seat tube where it connects to said seatstays (107, 108), said seat tube is split up into a seat tube posterior part and a seat tube anterior part, said seatstays (107, 108) connecting to said seat tube posterior part, said seatstays (107, 108) not connecting directly to said seat tube anterior part, the area between said seat tube posterior part and said seat tube anterior part defining a seat tube cavity, said seat tube posterior part and said seat tube anterior part connecting to one another both above and below said seat tube cavity, where said seat tube posterior part and said seat tube anterior part are configured to allow flex of said seat tube posterior part towards said seat tube anterior part, and thus allow vertical flex of said flexible chainstays (102, 103). • a rear wheel, • a low travel rear wheel suspension system, • a seat tube, • a left side flexible chainstay and a right side flexible chainstay, each with its front end attached to the seat tube of said bike less than 250mm from the rotational axis of a bottom bracket shell of said bike, said bottom bracket shell defined to be a part of said seat tube, • a left side seatstay and a right side seatstay, each having its lower end areas connected to the posterior end areas of each of said flexible chainstays (102, 103), and each of said seatstays (107, 108) extending upwards and forward with its other end connecting to the seat tube of said bike, • in the area where said flexible chainstays (102, 103) and said seatstays (107, 108) connect, a set of dropouts to rotably connect to a rear wheel of said bike, said dropouts can be integral parts of said flexible chainstays and/or said seatstays, or they can be mounted to said flexible chainstays and/or said seatstays through any release fastening elements, • in the area of said seat tube where it connects to said seatstays (107, 108), said seat tube is split up into a seat tube posterior part and a seat tube anterior part, said seatstays (107, 108) connecting to said seat tube posterior part, said seatstays (107, 108) not connecting directly to said seat tube anterior part, the area between said seat tube posterior part and said seat tube anterior part defining a seat tube cavity, said seat tube posterior part and said seat tube anterior part connecting to one another both above and below said seat tube cavity,