Vatyairi vatsva vazhinji vachangobva kutengabhasikoro remakomoHandizivi musiyano uripo pakati pe21-speed, 24-speed, uye 27-speed. Kana kuti ingoziva kuti 21-speed i3X7, 24-speed i3X8, uye 27-speed i3X9. Mumwe munhu akabvunzawo kana bhasikoro remakomo rine 24-speed richikurumidza kupfuura 27-speed. Kutaura zvazviri, chiyero chekumhanya chinongopa vatasvi mikana yakawanda yekusarudza. Kumhanya kunoenderana nesimba remakumbo emutasvi, kutsungirira uye hunyanzvi. Chero bedzi uine simba guru, 21-speed haisi kunonoka kupfuura 24-speed! Bhizinesi remakomo rinogona kufamba makiromita mangani?
Mukufunga, panguva imwe chete yekupeda bhasikoro, bhasikoro rine magiya makumi maviri nenomwe richamhanya nekukurumidza kupfuura rine magiya makumi maviri nemana. Asi kutaura chokwadi, kana paine giya rakawanda, peda bhasikoro richave rakanyanya kurema, uye bhasikoro richadzikira. Kana bhasikoro richidzikira, kumhanya kwaro kuchadzikirawo. Dzimwe nguva vamwe vanotanga vanotenga mabhasikoro emakomo vachiti, "Bhasikoro rangu rakanaka, sei zvakaoma kupeda bhasikoro?" Chikonzero ndechekuti haana kusarudza giya rinoenderana naye paanenge achitasva.

Kutanga ngatitarisei musiyano uripo pakati pemasevhisi makumi maviri nerimwe, masevhisi makumi maviri nemana uye masevhisi makumi maviri nemanomwe:

21-speed chainwheel & crank 48-38-28 flywheel 14~ 28

24-speed chainwheel & crank 42-32-22 flywheel 11~ 30(11~ 32)

27-speed chainwheel & crank 44-32-22 flywheel 11~ 30(11~ 32)

Chiyero chegiya inhamba yemagiya akakamurwa nenhamba yemavhiri anobhururuka

Chiyero chikuru chegiya remagiya chine kumhanya 21 3.43, chiyero chidiki chegiya 1

Chiyero chikuru chegiya remagiya chine masipidhi makumi maviri nemana 3.82, chiyero chidiki chegiya remagiya 0.73 (0.69)

Chiyero chikuru chegiya chine kumhanya 27 4, chiyero chidiki chegiya 0.73 (0.69)

Kubva pane izvi tinogona kuona musiyano uripo pakati padzo. 27-speed ne24-speed zvine giya rakakura kana diki pane 21-speed, izvo zvinogona kuita kuti ufambise nekukurumidza uye zvikuite kuti usanyanye kushanda nesimba. Nekuti 24-speed chainwheel haina kufanana ne21-speed, diki chainwheel rinogona kuwana giya rakareruka, iro rinobatsira zvikuru pakukwira. 24-speed bhasikoro rinogona kuwana transmission ratio ye1.07 kunyangwe richishandisa 2X1 speed ratio. Kana flywheel iri 11~32, rinogona kuwana transmission ratio ye1 (minimum transmission ratio ye21-speed i1). Saka mukana wepamusoro pe21-speed bhasikoro re24-speed hausi mugiya rinokurumidza chete, asi zvakanyanya mugiya rinononoka, izvo zvinoita kuti zvive nyore uye zvine simba kuti ufambise mumigwagwa yemakomo. Mutyairi mutsva anongofunga kuti 24-speed bhasikoro rinokurumidza kupfuura 21-speed. Pamwe vanhu vashoma vanogovanisa huwandu hwemazino ecrank nekaseti yega yega kuti vaone kuti musiyano uri papi.

Kana iri bhasikoro remakomo rine ma speed 27, vhiri rayo rinotenderera rinowanzo fanana nere speed 24. Musiyano ndewekuti crank hombe yekumberi inogadziriswa kubva pa 42 kusvika pa 44, iyo yakakodzera vanhu vane simba rakanaka remuviri. Bhasikoro remakomo rine ma speed 24 kana bhasikoro remakomo rine ma speed 27 ndiwo musiyano uripo pakati pezvikamu zvakasiyana zvebhasikoro zvakavandudzwa kuita mamodheru ari nani ane grade yaro.