Welcome to our bike fit calculator beta
There is more to bike sizing than having enough stand over clearance, and there is more to bike sizing than fixating on a frame size. Frame size is commonly an expression of the seat tube length. Manufacturers differ in how this is measured, so two or three bikes from different brands, each with the same published frame size may actually be significantly different in actual size. Or it might be expressed as a generic Small, Medium, Large, leaving the actual size even more open to interpretation, and difficult to compare brands or models.
More important than the seat tube length is the top tube length, as this has a big influence on the seat to handlebar distance, which is a major factor in riding position and comfort.
In addition to the frame size is the frame shape, or geometry. Some bikes are low and long. Some are "square", some are high, but short in length. Some have a lowered front end for more aggressive aerodynamics (and looks), but may be a pain in the neck to ride. So two bikes with the same frame size but a different shape will feel different to ride. And one is likely to be a better fit for you than the other.
THE BIKE - BODY CONTACT POINTS ARE:
FEET TO PEDAL - BUTT TO SADDLE - HAND TO BARS
A bike the wrong size or shape does not allow for an optimal fit position to be established. A bike that is suitable size and shape for the rider will allow an optimal fit to be achieved.
A bike fit is all about adjusting the bike to suit your body, not adapting your body to suit the bike. The bike wont complain about an adjustment, but your body will complain if you are asking it to adapt to a poorly fitted bike. Although some riders have a high tolerance for a poorly fitted bike, the further, faster or harder your ride, the more likely issues of mis-fit are likely to arise, even on a bike of a suitable size.
An initial bike fit involves using the information from the sizing process to establish a sound bio-mechanical starting position for the rider to experience. Initial adjustments result in a seat and handlebar position within normative ranges for the rider, and these can often be established and set up by an experienced rider. But who is normal, or average? A comprehensive bike fit requires an experienced third party to interview, measure, observe, assess and interpret the myriad factors that influence an optimal bike fit, and work with the rider to achieve a happy relationship.
999.99 CMRecommended Top Tube + Stem length
999.99 CMRecommended Effective Top Tube
999.99 MMRecommended Stem Length
999.99 DEGRecommended Seat Tube Angle
999.99 CMRecommended Seat Tube Length/Frame Size
999.99 CMMaximum Standover Height
999.99 CMRecommended Handlebar Width
The recommendations resulting from the use of this sizing calculator are for general guidance, and should not be relied upon solely for making a purchasing decision, or to establish an initial fit position. The user is responsible for ensuring accurate body measurements and inputs, and for evaluating the recommendations in relation to other advice and experience.
Jenson USA and Fit Kit Systems are not responsible for:
- Purchasing a bike of an inappropriate style, model, size, or geometry
- Injuries or damages resulting from the recommendations, either in purchasing or riding.
If you have questions about how to measure your body, or are unsure if your results are accurate, please contact a Gear Advisor for assistance: