# Cycling on a Grade – Part II of II

In a previous post, I introduced Cycling on a Grade, a method to estimate the relative difficulty of a ride.  The primary factors for this first portion were ride distance and relative speed.

This blog addresses the secondary factors that make a ride difficult, things like elevation gain, weather, road conditions, etc.  Another blog will introduce ‘suspect math’ that will support scoring for these factors.  This blog introduces the factors (mostly to make sure none are missed or any are not needed) and provides the base or an ‘allowable’ number for each of the secondary factors.  For example, for each of the ride levels introduced in the first blog, an elevation value is provided.  This amount is the number of metres of elevation gain needed before the impact of an additional metre is considered.  The base simplifies the calculation somewhat but also recognizes that a rider who is at the red level should have little difficulty absorbing 500M of cumulative elevation gain.  But what about the 501st metre; when do secondary factors turns an otherwise ‘blue’ ride ‘red’ or a ‘red’ ride ‘black’?  This is where these secondary factors and their impact come in.

# Primary and Secondary Factors

As noted above, there are 2 primary factors: distance and speed.  There are also 13 secondary factors which either contribute an absolute amount or an amount based on distance.  The following table lists all 15 factors, provides a brief description and a range of impacts on a ride.  The Parent field provides a grouping of like determinants, namely:

• Route: relating to the area being traveled.  For example, distance, elevation or trail head.
• Weather: the climatic conditions when the route is attempted.  For example wind, rain or temperature.
• Cyclist: The abilities of the individual relative to the route and the conditions.  For example comfort riding unsupported or the quality of the bike owned.

# But What Are They Worth?

The next blog will discuss the algorithms for each of the above.  Prior to going down a rabbit hole of cartesian factors a more important consideration is whether the right secondary factors are being considered.  Drop me a note or a comment on the above factors.  Have I missed a big one, included some questionable ones or are the above really irrelevant when planning a ride for a club?