WCA Timer Update:
2-Pad vs 4-Pad
The World Cube Association is introducing an important change to official speedcubing timing. Starting in 2027, competitors will move from the familiar 2-pad system to 4-pad timing on the Speed Stacks G5.
What Is Changing?
Speedcubers are already familiar with placing both hands on the StackMat timer before starting a solve. However, the Speed Stacks G5 contains four touch sensors rather than only two.
Until the new rule takes effect, WCA competitions continue using the G5 timer in 2-pad mode. From January 2, 2027, official timed attempts will move to 4-pad mode.
2-Pad Mode
Only the two main hand sensors are required.
Left hand → Main left sensor
Right hand → Main right sensor
Thumb sensors are not required.
4-Pad Mode
All four G5 sensors must be activated.
Left hand → Main sensor + thumb sensor
Right hand → Main sensor + thumb sensor
Why Is WCA Making This Change?
One of the challenges with 2-pad timing is determining whether a competitor has correctly started or stopped the timer during very fast movements.
Certain hand movements can be difficult for a judge to identify in real time. Video review can sometimes help, but checking every solve frame-by-frame is not practical for normal competitions.
By requiring all four sensors, the timer itself provides stronger confirmation that both hands are positioned correctly when the timer is started and stopped.
Key Points for Competitors
The new requirement begins in 2027.
Official timed attempts will use the G5 in 4-pad mode.
Previous results will not be reset.
Cubers can start becoming familiar with 4-pad positioning.
What About G3 and G4 Timers?
Older StackMat generations do not provide the same four-pad system required by the new standard. This makes the G5 the important timer for organizers preparing equipment for future WCA competitions.
| Timer | Current Use | From Jan. 2, 2027 |
|---|---|---|
| G3 | Currently permitted under existing requirements | Not suitable for required 4-pad timing |
| G4 | Currently permitted under existing requirements | Not suitable for required 4-pad timing |
| G5 | Used in 2-pad mode | Required in 4-pad mode |
Will Existing WCA Records Be Reset?
No. Existing official results and records achieved using the previous timing system will remain valid.
According to the WCA announcement, the practical timing difference between the systems is expected to be negligible for most competitors. Existing results will therefore continue to rank together with future 4-pad results.
The WCA also plans to make it possible to filter 4-pad results for selected events such as 2×2, Clock, Pyraminx and Skewb.
Transition Timeline
What This Means for CubeArena
For CubeArena competitions and future competition equipment, Speed Stacks G5 timers are now the best long-term choice.
We will continue following the latest WCA regulations and help Cambodia's cubing community prepare for the transition.
Future CubeArena guides will also explain proper 4-pad hand placement, starting technique, stopping technique and competition procedures.
Keep Cubing. Keep Improving.
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