FIT&FIND

- Find a bike. your size. your shape

  • smartfit body sizer

  • BikeFit

  • Geometry Search Tool

  • Stack & Reach Search Tool

  • Upload Bike Fit Data

WHAT IS A STACK & REACH SEARCH?

Stack and reach sizing is a simple yet effective measuring system based on just two measurements. Both measurements relate to two important reference points on the bike. These are:

1) the top/centre of the head tube (where stem and bars are mounted).
2) the centre of the bottom bracket (rotating axis for the cranks)

Stack is the vertical height between these points while reach is the horizontal length between them, as shown in the adjacent graphic.

By using a stack measurement one can determine how tall the front of the bike needs to be, and by using reach one can determine how long the bike needs to be. Importantly, both these measurements relate directly to the pedaling axis.

If you already know the stack & reach numbers you need (these are available on some manufacturers websites) proceed to the search tool page and continue with your search. If you have no stack and reach numbers to work with please see the adjacent instructions on how to get these numbers off your existing rig.

HOW TO USE THE STACK & REACH TOOL

Measurements:
(A) Stack
= [Ground to top of Top Tube] - [Ground to centre of Bottom Bracket]
 

(B) Reach

= [Wall to centre of Head Tube] - [Wall to centre of Bottom Bracket]


Please note: All measurements must be accurate to the millimetre. We highly recommend using measurements from a manufacturer's geometry table or enlisting the help of a bike fitting professional. 

 

POINTERS & TIPS FOR USING THE STACK & REACH TOOL

STACK REACH STACK ON TRI BIKES STEM SPACES STEM LENGTH BARS STACK REACH STACK ON TRI BIKES BARS STEM LENGTH STEM SPACES STACK REACH STACK ON TRI BIKES BARS STEM LENGTH STEM SPACES STACK REACH STACK ON TRI BIKES BARS STEM LENGTH STEM SPACES

  • GENERAL
    Although stack and reach deals with just two of the three contact points on the bike (not taking into account saddle position), for the most part, especially on tri/TT bikes this is not a problem as the adjustment available on the saddle rails and post is usually enough to place you in the correct position.

    Road bikes can sometimes pose problems in this area if the seat tube angle (G) is towards either extreme, ie too slack or too steep. If in doubt about the bike you have in mind just contact us and we'll work it out.
  • A) STACK
    A stack height is useful because it uses the bottom bracket as a reference point, giving you an accurate front-enf height irrespective of how high the bottom bracket is or how long the fork is. This makes a stack height measurement marginally more accurate than a head tube length measurement.
  • B) REACH
    Reach (R) goes hand in hand with stem length so keep this in mind when looking for an exact match to your reach measurement. Thus, if for example your reach measurement was 405 with a 100mm stem, you could also use a reach of 395 with a 110mm stem or a reach of 415 with a 90mm stem, and so on.
  • C) STACK ON TRI BIKES
    On tri or TT bikes stack height is intricately linked to the type of bar you intend on using. Tri bar stack heights vary considerably so it's best to know those dimensions prior to making a decision on a frame. If you're buying pre-built bike it's always better to check on the amount of adjustment available on the stock bar.
  • D) BARS
    Bars play a part in the overall reach of the bike, especially on tri bikes where there is often limited adjustment. It's always good to know what bar you'll be using prior to purchasing a frame to build up. On stock bikes, check the manufacturers website for details on the bar and stem or email us for clarification.
  • E) STEM LENGTH
    Stem length also plays an important part in the overall reach of the bike. Raod bikes use stems between 60mm - 140mm whilst on tri/TT bikes stems tend to be on the shorter side, ranging from 60mm to 110mm.
  • F) STEM SPACES
    Most bike manufacturers recommend a stem spacer quota of no more than 45mm in height, which includes the headset cap. Keep this in mind when working out your overall stack height as you may need to add/subtract stem spacers to adjust.

Results

Resuts include all bikes within the parameters you have set and include the year model due to the fact that geometries sometimes change. In the event of limited or no results use the message box on this page and we will get back to you within 24 hours to resolve the problem.

Manufacturer Model Size Year Type Option Material Gender Link
No Results