Comparison among the gear inches, metres of developments and gain ratios of different models of StridaInformation about measuring gears:
http://en.wikipedia.org/wiki/Bicycle_gearing#Measuring_gearsStrida 1, Strida 2, Strida 3, Strida 5 and Strida LTGear inches: 16" × 100 ÷ 30 =
53.3"Metres of development: 1.185m × 100 ÷ 30 =
3.95mThis means that the bike travels about 3.95 metres per crank rotation.
Gain ratio: 1185mm ÷ π ÷ 2 ÷ 170mm × 100 ÷ 30 =
3.70Strida MiniGear inches: 14" x 88 ÷ 30 =
41"Metres of development: 1.02m × 88 ÷ 30 =
2.99mThis means that the bike travels about 2.99 metres per crank rotation.
Gain ratio: 1020mm ÷ π ÷ 2 ÷ 150mm × 88 ÷ 30 =
3.17This reflects the reason why Strida mini has lower value on both gear inches and metres of development than Strida SD in low gear but you still feel pedalling harder on a Strida mini than on a Strida SD in low gear when going up an incline. It is because the crank arms used on Strida Mini (150mm) is shorter than those used on Strida SD and other models of Strida (170mm).
Strida SXGear inches: 18" × 100 ÷ 30 =
60"Metres of developmentwith
Innova tyres: 1.325m × 100 ÷ 30 =
4.42mThis means that the bike travels about 4.42 metres per crank rotation.
with
Schwalbe Kojak tyres: 1.315m × 100 ÷ 30 =
4.38mThis means that the bike travels about 4.38 metres per crank rotation.
Gain ratiowith
Innova tyres: 1325mm ÷ π ÷ 2 ÷ 170mm × 100 ÷ 30 =
4.13with
Schwalbe Kojak tyres: 1315mm ÷ π ÷ 2 ÷ 170mm × 100 ÷ 30 =
4.10Strida SD and the MAS Special EditionGear inchesin
low gear: 16" x 80 ÷ 30 =
42.7"in
high gear: 16" x 80 x 1.65 ÷ 30 =
70.4"Metres of developmentin
low gear: 1.185m × 80 ÷ 30 =
3.16mThis means that the bike travels about 3.16 metres per crank rotation in low gear.
in
high gear: 1.185m × 80 × 1.65 ÷ 30 =
5.21mThis means that the bike travels about 5.21 metres per crank rotation in high gear.
Gain ratioin
low gear: 1185mm ÷ π ÷ 2 ÷ 170mm × 80 ÷ 30 =
2.96in
high gear: 1185mm ÷ π ÷ 2 ÷ 170mm × 80 x 1.65 ÷ 30 =
4.88Strida equipped with speed-drive and 18" wheels
(with Schwalbe Kojak tyres)Gear inches:
in
low gear: 18" x 80 ÷ 30 =
48"in
high gear: 18" x 80 x 1.65 ÷ 30 =
79.2"Metres of development in
low gear: 1.315m × 80 ÷ 30 =
3.51mThis means that the bike travels about 3.51 metres per crank rotation in low gear.
in
high gear: 1.315m × 80 × 1.65 ÷ 30 =
5.79mThis means that the bike travels about 5.79 metres per crank rotation in high gear.
Gain ratioin
low gear: 1315mm ÷ π ÷ 2 ÷ 170mm × 80 ÷ 30 =
3.28in
high gear: 1315mm ÷ π ÷ 2 ÷ 170mm × 80 x 1.65 ÷ 30 =
5.42