Bapalami ba bangata ba bacha ba sa tsoa reka abaesekele ea thabaha ke tsebe phapang lipakeng tsa 21-speed, 24-speed, le 27-speed.Kapa tseba feela hore 21-speed ke 3X7, 24-speed ke 3X8, le 27-speed ke 3X9.Hape motho e mong o ile a botsa hore na baesekele ea thaba ea 24-speed e lebelo ho feta 27-speed e le 'ngoe.Ha e le hantle, karo-karolelano ea lebelo e mpa e fa bapalami menyetla e mengata ea ho khetha.Lebelo le itšetlehile ka matla a leoto la mopalami, mamello le bokhoni.Hafeela u ntse u e-na le matla a maholo, lebelo la 21-speed ha le liehe ho feta baesekele ea 24-speed!Baesekele ea thaba e ka palama limaele tse kae?
Ka khopolo, sebakeng se le seng sa pedaling cadence, baesekele ea 27-speed e tla matha ka potlako ho feta 24-speed e le 'ngoe.Empa ha e le hantle, ka tekanyo e phahameng ea gear, pedaling e tla ba boima haholo, 'me cadence e tla fokotseha ka tlhaho.Haeba cadence e fokotseha, lebelo le tla fokotseha ka tlhaho.Ka linako tse ling ba qalang ba reka libaesekele tsa lithaba ebe ba re, “Baesekele ea ka e ntle, ke hobane’ng ha ho le thata hakaale ho e hata?” Lebaka ke hore ha aa ka a khetha tekanyo ea likere e mo tšoanelang ha a e palama.

Pele, a re shebeng phapang lipakeng tsa 21-speed, 24-speed le 27-speed:

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)

Karo-karolelano ea lisebelisoa ke palo ea likere tse arotsoeng ka palo ea li-flywheels

21-speed maximum gear ratio 3.43, bonyane ba gear ratio 1

24-speed maximum gear ratio 3.82, bonyane ba gear ratio 0.73 (0.69)

27-speed maximum gear ratio 4, bonyane ba gear ratio 0.73 (0.69)

Ho sena re ka bona phapang pakeng tsa bona.Lebelo la 27-speed le 24-speed li na le tekanyo e kholoanyane kapa e nyenyane ea gear ho feta 21-speed, e ka etsang hore u palame ka potlako le ho etsa hore u palame boiteko bo fokolang.Hobane 24-speed chainwheel ha e tšoane le ea 21-speed, lebili le lenyenyane le ka fumana tekanyo ea gear e bobebe, e leng molemo o moholo ha o hloa.Sebaesekele se lebelo la 24 se ka fihlella sekhahla sa phetisetso sa 1.07 le haeba se sebelisa lebelo la lebelo la 2X1.Haeba flywheel e le 11 ~ 32, e ka finyella karolelano ea phetisetso ea 1 (tekanyo e fokolang ea phetisetso ea lebelo la 21 ke 1).Kahoo molemo ho feta baesekele ea 21-speed ea 24-speed e le 'ngoe ha e felle feela ka lebelo le potlakileng, empa ho feta ka gear e liehang ka ho fetisisa, e leng se etsang hore ho be bonolo le ho ba matla ho uena ho palama litseleng tsa lithaba.Mopalami e mocha o nahana feela hore baesekele ea 24-speed e lebelo ho feta baesekele ea 21-speed.Mohlomong ke batho ba 'maloa ba arolang palo ea meno a crank e' ngoe le e 'ngoe le k'hasete ho bona hore na phapang ke efe.

Ha e le baesekele ea thaba ea 27-speed, flywheel ea eona hangata e tšoana le ea 24-speed.Phapang ke hore crank e kholo ka ho fetisisa e ka pele e lokisoa ho tloha ho 42 ho isa ho 44, e loketseng batho ba nang le matla a matle a 'mele.Sebaesekele sa thaba ea 24-speed kapa 27-speed mountain bike ke phapang pakeng tsa likarolo tse sa tšoaneng tsa libaesekele tse ntlafalitsoeng ho ea ho mehlala e metle ka sehlopha sa eona.