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Cape Town Cycle Tour · 109 kmCape Town Cycle Tour time predictor
Type your FTP and weight for a rough Cape Town Cycle Tour finish time — 109 km with about 1 200 m of climbing — or switch to the 947 Ride Joburg. It is the shape of the day, not a promise: bunches and wind matter more than watts.
| Your FTP | Rough finish |
|---|---|
| 196 W | 4:27:39 |
| 207 W | 4:20:16 |
| 230 W | 4:06:45 |
| 242 W | 4:00:35 |
| 253 W | 3:55:21 |
Riding time from a power balance at about 78% of FTP. Bunches, wind and the start batch change a mass-start ride far more than watts do: treat this as the shape of the day, not a target.
How the estimate is made
The predictor assumes you ride on your own at about 78% of FTP — a sensible all-day effort for a long event — and works out speed from a simple power balance: air resistance, rolling resistance and the work of lifting you and your bike up the climbs. For the Cycle Tour that is 109 km and about 1 200 m of climbing, including Chapman’s Peak and Suikerbossie.
It is deliberately labelled rough. Sitting in a good bunch can take a lot off it. On a mass-start ride, the bunch you sit in, the wind on the day and your start batch change the time far more than a few watts do. What it does give you is an order of magnitude to plan a day around — and an honest sense of what twenty more watts of FTP would be worth.
FTP at altitude
An FTP tested in Gauteng is lower than the same rider would produce at the coast. If you tested at altitude, say so, and the predictor credits you the difference for a sea-level race like the Cycle Tour. For the 947 at 1 753 m it does the opposite for a coastal rider.
Building the watts
The biggest improvements for most riders come from consistent endurance riding and a weekly dose of sweet spot and threshold, not from intervals alone. A full 24-week Cycle Tour block for the expected 14 March 2027 race had its harder sessions arriving from 30 November; a plan built today counts back from race day.
Common questions
What is a good Cape Town Cycle Tour time?
Many recreational riders finish between four and five hours; sub-3:30 is strong riding. Your start batch and bunch matter a lot.
How far is the Cape Town Cycle Tour?
About 109 km around the Cape Peninsula, with roughly 1 200 m of climbing including Chapman’s Peak.
How do I find my FTP?
A hard 20-minute test: take 95% of the average. The power zone calculator does it for you.
Does weight matter on the Cycle Tour?
On the climbs, yes; on the flat, much less. Watts per kilo is the number that matters on Chapman’s Peak.
Put this calculator on your club’s website
Free for running clubs, coaches, race organisers and bloggers. Copy the code below into any page that accepts HTML — WordPress, Wix and Squarespace all do — and your members get the same live cape town cycle tour time predictor, with nothing to install and no sign-up.
Keep the credit line under it, please: that is the only thing we ask in return.
Related
Build my Cycle Tour planFree to build. See your whole block before you pay.