Power, Resistance and Cadence Tables – Wattbike UK

How can the tables be used

The power, cadence and resistance tables provided below can be used in a number of ways:

Use the table to establish the correct power output (in Watts), by resistance setting and cadence (in 5 rpm bands) required for any particular training session. For ease of reference the Watts have been rounded to the nearest 5 W.
You can 'calibrate’ an individual smart bike by selecting the rpm and power output you want to achieve and finding the level on the bike. Let’s assume you wanted to ride at 90 rpm at 200 W (the Wattbike Pro table shows this at level 3). Start with the air brake at level 3 and adjust the air brake until you are consistently hitting 200 W at 90 rpm. This is the equivalent setting for that bike (say air brake position 3.5).
Conversely at the table air resistance setting required you can increase/reduce the cadence to match the power output.

Power Table for Wattbike Trainer

Cadence	1	2	3	4	5	6	7	8	9	10
40	15	15	15	20	25	25	25	30	30	30
45	20	20	20	25	30	30	30	35	35	35
50	25	25	25	30	35	35	40	40	45	45
55	30	30	35	40	40	45	50	50	55	55
60	35	35	40	45	50	55	60	65	70	70
65	40	45	50	55	65	70	75	80	85	90
70	50	50	60	70	75	85	95	100	105	110
75	55	60	70	80	95	105	115	120	130	135
80	65	70	85	95	110	125	135	145	155	160
85	75	80	100	115	130	145	160	170	180	190
90	85	95	115	135	150	170	185	200	215	225
95	100	110	130	155	175	200	215	230	245	260
100	110	125	150	175	200	225	245	265	285	300
105	125	140	170	200	230	260	280	300	325	340
110	140	155	190	225	260	290	320	340	365	385
115	155	175	210	250	290	325	355	385	415	435
120	170	190	235	280	325	365	395	430	460	485
125	190	210	260	310	360	405	440	480	513	540
130	210	230	280	340	400	450	490	530	570	595

Power Table for Wattbike Pro

Cadence	1	2	3	4	5	6	7	8	9	10
40	25	30	30	40	45	45	50	50	55	55
45	35	40	40	45	50	55	55	60	60	65
50	40	40	50	55	60	65	70	70	75	80
55	50	50	60	70	75	80	90	95	100	105
60	60	60	70	80	90	100	110	115	120	125
65	70	80	90	100	115	125	135	150	155	160
70	85	90	105	120	135	150	165	175	185	190
75	100	105	130	150	175	185	200	210	225	240
80	115	125	150	170	195	215	235	250	270	280
85	130	145	170	195	225	260	275	295	320	340
90	150	165	200	235	265	300	325	350	375	390
95	175	185	225	265	310	350	375	400	425	450
100	195	215	260	310	355	395	430	465	500	520
105	210	230	295	350	400	445	490	525	565	600
110	245	270	330	395	455	510	555	600	645	675
115	270	310	380	445	515	575	625	675	725	760
120	300	335	410	490	570	640	695	750	810	850
125	330	370	450	545	635	710	775	835	900	945
130	360	405	495	600	705	785	855	925	995	1045

Power Table for Wattbike Nucleus Standard

Cadence	1	2	3	4	5	6	7	8	9	10
40	45	45	45	45	50	50	50	50	50	50
45	50	50	50	55	55	55	55	55	55	55
50	55	55	60	60	65	65	70	70	70	75
55	60	60	70	70	70	75	80	80	80	80
60	65	70	75	80	85	90	95	95	100	105
65	70	80	85	90	100	105	110	115	120	125
70	85	90	95	105	115	125	130	135	140	145
75	90	95	105	115	130	140	150	155	165	170
80	105	110	120	135	150	160	170	180	185	195
85	115	120	135	150	165	180	195	205	210	225
90	125	140	155	175	195	210	225	235	245	255
95	140	155	170	195	220	240	255	265	275	290
100	155	170	195	220	245	265	285	300	315	330
105	170	185	215	235	275	300	320	335	355	370
110	190	210	135	270	305	235	355	375	400	415
115	205	230	255	295	335	370	395	420	450	465
120	225	250	290	330	375	410	440	465	490	510
125	245	270	310	360	410	450	480	510	545	565
130	260	290	340	390	450	495	525	565	600	620

Power Table for Wattbike Nucleus High

***The Nucleus 'High' is only available at special request, this bike has a very high resistance curve and only suited to extremely powerful riders.***

Cadence	1	2	3	4	5	6	7	8	9	10
40	50	50	50	55	55	60	60	65	65	70
45	55	55	60	60	60	65	65	70	70	80
50	65	65	70	80	85	90	95	100	100	105
55	75	75	85	90	100	105	110	120	120	125
60	85	90	100	110	120	130	140	145	150	160
65	95	105	120	130	140	155	165	170	180	190
70	115	120	135	150	170	185	195	210	220	230
75	130	135	155	175	190	215	230	245	260	275
80	145	160	180	205	230	255	270	290	305	320
85	160	180	205	235	265	295	315	335	355	375
90	180	200	230	270	305	335	365	385	410	430
95	205	225	260	305	350	380	415	440	470	495
100	225	255	295	345	395	440	475	505	540	565
105	250	285	330	385	445	495	535	570	630	640
110	280	315	370	435	500	560	610	650	690	730
115	305	350	410	480	560	625	680	725	760	815
120	340	390	455	545	625	700	765	815	870	925
125	370	415	495	600	690	770	845	895	960	1020
130	400	450	540	655	760	845	925	985	1055	1120

The Wattbike load cell measurement system is on the chain and works together with a magnet system that tracks pedals. The load cell measures directly the force the rider is applying through the cranks onto the chain (the data is collected at a resolution of 100 samples a second – a pedal revolution can be measured to 5 decimal places). The accuracy of the Wattbike relates to the measurement system.

The measurement system is not influenced by the air and magnetic resistance (this just creates variable resistance for the rider to work against), nor by environmental conditions (heat/cold, humidity, altitude), nor by the chain being 'tight’/'slack’. THE LOAD CELL WILL MEASURE AT ALL TIMES THE FORCE BEING APPLIED INCLUSIVE OF ANY VARIABLE 'CONDITIONS’. There will be variances between Wattbikes to reflect calibration (+/- 2%) and manufacturing tolerances but each Wattbike is precisely calibrated at the factory.

What does this mean?

There is a common belief that every bike produces the same 'result’ on the same air brake setting i.e.

80 rpm at level 1 = 115 W OR
90 rpm at level 3 = 200 W

This is incorrect - the tables are mathematically constructed (and rounded to nearest 5 rpm and 5 W) and assume perfection i.e. constant application of force and constant cadence under set environmental conditions and are for guidance only.

Around the individual Wattbike calibration/tolerances, 80 rpm for 115 W may be at air resistance setting 1.5 and 90 rpm for 200 W at level 3.5 (or higher/lower).

Any differences may be also due to the air resistance conditions. For example significant differences will be seen at altitude (due to the density of air – 'drag’ is reduced). We have 6 Wattbikes in Colorado Springs (altitude 1839 m) which are 15% (at level 10) - 25% (at level 1) below the standard table figures. To apply the same force at the same rpm as on a sea level Wattbike the air resistance would need to be increased.