I have a babyjogger 3 with 20" wheels. Its really fab. 3 1/2 years old now. One of the most heavily used bits of babykit that we got (apart from cot/nappy changing table etc.!) I really recommending getting a proper running buggy as they are so light. This one is not easy to fold down, but thats not an issue as it just stays in the house and we use a normal buggy for everyday use. Its a luxury to have a specific running buggy, I know. But if you can get one, you won't regret it. Its light as a feather.