Starling Cycles Sizing Guide

The sizing recommendations for Starling bikes are given in the geometry charts on the bike pages.

These are what I recommend, don’t be tempted to try and be fashionable and size up to a bike that’s too big for you.

But if you are a little confused, or would like to compare to your current bike, watch the video below. Then read the information below.

Effective Top Tube

Bikes have got longer recently. Reach and wheelbase have lengthened.

This is good for bike stability and something Starling Cycles has pushed since day one.

Luckily, our bodies can easily accommodate this lengthening when stood up on the pedals.

But when seated it is harder to accommodate a bike length increase. So to counter this longer reach, seat tube angles have got steeper (be careful of some manufacturers who haven’t quite worked this out yet!). What we end up in is a position where to size a bike for the rider, the reach becomes less important, and the old measurement of effective top tube reverts to being the best to use.

Effective top tube (horizontal length from top of head tube to seat post) isn’t perfect, it doesn’t take into account saddle height, bar height, stem length and bar roll. But it’s pretty good. And with saddle and bar changes you can get something that fits you.

So in summary, long reach and wheelbase is good for bike performance, but not really a ‘ergonomic’ sizing measurement. Effective top tube is what you should be comparing when looking for a bike to fit you.

Seat Tube Length

An easy one. We just need to understand the pedalling height of your saddle, and the dropper you intend to use.

Measure your existing pedalling seat position at full extension; from saddle rails to centre of BB. For example, my measurement is 740mm.

You then need to compare this measurement by the extension of your chosen dropper, for example a 160mm BikeYoke dropper has a minimum extension of 202mm, and a maximum extension of 334mm.

For a large sized frame, seat tube is 440mm. Considering my saddle height, 740mm, minus minimum extension, 202mm, we have 538mm, so 98mm of post showing, all good.

For 740mm, minus maximum extension, 334mm, we have 406mm, so with a 440mm seat tube, we will not exceed maximum insertion.

Custom Sized Bikes

Starling Cycles is temporarily not offering custom sized frames.

Please bear with us and we will bring this option back soon as we can.

But if you feel that the current range isn’t quite right; either you are between sizes, or outside the range of sizes, don’t worry too much. Changes to saddle position, stem length, bar roll can have a big impact and get the cockpit size you need.