Lub luag haujlwm rau kev xa koj lub zog pedal mus rau txoj kev, lub roob tsheb kauj vab lub zog ua kom koj lub log mus ncig.
Kev nkag siab txog kev siv thev naus laus zis, iav piv thiab kev xav koom nrog yuav pab koj pedal smoother, sai dua thiab ntxiv.
Txawm li cas los xij, rau cov tshiab rau kev ua si nawv, lub zog ntawm koj lub tsheb kauj vab roob yuav txawv ntawm lwm hom tsheb kauj vab uas koj tau siv yav dhau los. Hauv phau ntawv qhia no, peb tshawb nrhiav lub roob tsheb kauj vab dab tsi, siv lawv li cas thiab xaiv cov iav zoo tshaj plaws ntawm txoj kev.
Dab tsi yog gears ntawm lub tsheb kauj vab roob?
Thaum sib sau ua ke, lub drivetrain dhau los ua ib qho tseem ceeb ntawm koj lub tsheb kauj vab roob. - Andy Lloyd / Peb Media
Thaum koj thawb rau ntawm lub pedals ntawm koj lub tsheb kauj vab roob, lub zog koj tsim tau pauv mus rau lub log tsheb los ntawm kev tsav tsheb, thawb lub tsheb kauj vab mus rau pem hauv ntej.
Nws yooj yim npaum li cas los tig lub pedals yog txiav txim los ntawm lub iav piv ntawm koj lub hauv ntej chainring thiab rear cog. Qhov sib piv ntawm cov iav no kuj txiav txim siab koj qhov kev sib tw (yuav nrawm npaum li cas koj tig lub pedals) thiab ntau npaum li cas rau pem hauv ntej tau ua tiav ib qho pedal stroke.
Roob tsheb kauj vab iav tso cai rau koj xaiv koj lub iav piv kom haum rau txoj kev taug kev, kev siv zog ntau npaum li cas koj xav muab thiab qhov deb npaum li cas koj xav kom npog ib qho kev mob stroke.
Los ntawm kev sib piv koj cov iav mus rau txoj kev taug kev, koj tuaj yeem nyob hauv qhov ua tau zoo tshaj plaws rau koj thiab txo qis kev siv hluav taws xob ntau.
Lub roob tsheb kauj vab ua haujlwm li cas?
1x drivetrains yog cov qauv kev xaiv rau cov tsheb kauj vab roob niaj hnub thiab eMTBs, nyiam rau lawv qhov ntau, kev ntseeg tau thiab kev ua tau zoo. - Ian Linton / Peb Media
Txog tam sim no cov iav feem ntau pom nyob rau niaj hnub roob tsheb kauj vab yog sab nraud 1x tsav tsheb.
Lub tsheb ciav hlau no yog tsim los ntawm ib qho kev sib txuas hauv pem hauv ntej (li no lub npe '1x') thiab ntau hom kab rov tav. Lub iav yog hloov los ntawm ib tug rear derailleur, uas yog actuated los ntawm ib tug handlebar-mounted shifter.
Thaum lub tshuab hloov pauv tau nias, tus derailleur txav cov saw hlau nce lossis nqis ntawm lub cassette, mus rau hauv lub iav loj lossis me dua. Feem ntau, lub derailleur yog tsav los ntawm ib tug cable uas txuas nws mus rau lub shifter.
Txawm li cas los xij, nyob rau hauv cov ntaub ntawv ntawm hluav taws xob MTB pawg xws li SRAM's Eagle Transmission, lub derailleur yog qhib los ntawm lub teeb liab wireless thiab txav los ntawm kev sib xyaw servo lub cev muaj zog.
Kuj qee zaum pom ntawm txoj kev yog cov laus 2x thiab 3x tsav tsheb. Ntau dua li muaj ib lub chainring thiab ib qho kev sib tw dav dav, cov tsav tsheb no vam khom rau pem hauv ntej derailleur los hloov ntawm chainrings thiab muaj me me rear cassette.
Cov downsides ntawm 2x lossis 3x tsav tsheb rau kev caij tsheb kauj vab hauv roob yog qhov nyuaj, txo cov saw tuav thiab iav ntau, thiab qhov hnyav ntxiv.
Yuav siv cov iav ntawm lub tsheb kauj vab roob
Tam sim no peb muaj cov ntsiab lus ntawm yuav ua li cas roob tsheb kauj vab gears ua haujlwm, cia peb saib seb yuav siv lawv li cas ntawm txoj kev.
Yuav ua li cas hloov cov iav ntawm lub tsheb kauj vab roob
Nws yog ib qho tseem ceeb uas yuav tsum tau siv sij hawm ib pliag kom paub koj tus kheej nrog qhov chaw thiab qhov kev ua ntawm lub shifter kom thaum nws los txog rau kev siv koj lub zog tawm ntawm txoj kev, koj tuaj yeem ntseeg siab ua rau koj lub iav hloov yam tsis tas yuav saib xyuas koj lub shifter.
Nws tseem yog ib qho tseem ceeb kom txo qis load tsis tsim nyog ntawm lub zog thaum hloov. Qhov no yuav ua rau lawv lub neej ntev, thiab txo qhov tsim nyog zaus ntawm kev pabcuam thiab qhov ua tau ntawm cov tshuab xws li cov saw hlau snapped.
Feem ntau, nws yog ib qho kev xyaum zoo tsis txhob hloov mus rau hauv qis dua (yooj yim dua) iav thaum muab ntau lub zog los ntawm cov pedals. Qhov tsawg kawg nkaus, nws suab thiab hnov qhov txaus ntshai, tab sis yog tias thawb mus rau qhov siab, nws tuaj yeem ua rau cov saw hlau puas.
Txhawm rau zam qhov no, sim hloov mus rau hauv lub iav kom raug ua ntej pib nce siab, tsis yog ib feem ntawm nws. Kev hloov mus rau qhov siab dua (nyuaj) iav hauv qab lub zog tsis tshua muaj teeb meem, tab sis kev saib xyuas me ntsis thaum nws los txog rau lub sij hawm koj qhov kev hloov yuav mus ntev.
Kuv yuav siv lub iav twg thiab thaum twg?
Nrog rau feem ntau 1x drivetrains boasting 12 lub zog, nws yog ib qho tseem ceeb kom paub seb yuav siv qhov twg thiab thaum twg. - Andy Lloyd / Peb Media
Kev xaiv iav zoo yog txhua yam hais txog kev ua haujlwm zoo. Qhov zoo tshaj plaws, koj xav tau nyob rau hauv ib lub iav uas ua rau koj tig koj ob txhais ceg ntawm qhov chaw xis nyob thaum siv lub zog txaus los tsim qhov tsim nyog rau txoj kev taug mus tom ntej.
Qhov no tseem ceeb tshwj xeeb tshaj yog thaum caij undulating singletrack. Lub iav siab dhau lawm thiab koj yuav raug straining tig lub pedals, lub iav qis dhau thiab koj yuav tig koj ob txhais ceg yam tsis muaj kev vam meej.
Cov lus qhia rau kev xaiv txoj cai MTB iav
Tsis muaj ib lub iav-haum-tag nrho, thiab koj qhov kev xaiv iav yuav nyob ntawm koj lub zog, nyiam cadence thiab qhov siab ntawm txoj kev koj caij. Tab sis cov lus qhia hauv qab no, raws li cadence, yuav pab koj xaiv lub iav kom raug thiab txuag lub zog hauv cov txheej txheem.
1. Ntev maj mam nce
Yog tias koj caij tsheb ciav hlau ntev ntev nws yog qhov zoo tshaj plaws kom tig ntawm ib ncig ntawm 80 mus rau 90 revolutions ib feeb (RPM).
Tiv thaiv kev ntxias kom zom cov iav loj - nws yuav ua rau koj cov phooj ywg zoo siab tab sis koj yuav hlawv koj ob txhais ceg sai dua.
2. luv technical ascents
Ntawm luv luv, ntau technically nyuaj nce nrog obstacles xws li cov hauv paus hniav, pob zeb thiab nruj lem, tsom rau ib ncig ntawm 60 rpm.
Qhov no yuav ua rau koj traction zoo yog tias nws nplua thiab ua kom yooj yim rau nqa koj lub log pem hauv ntej mus rau ledges.
3. Ceev ceev
Yog tias koj tig tawm lossis thawb lub iav uas nyuaj dhau, koj yuav tsis tuaj yeem siv lub zog siab tshaj plaws rau lub pedals thaum nrawm.
Kiv zog mus txog li 100 rpm, ces poob ib lub iav ntawm ib lub sij hawm nyob rau tom qab. Koj tuaj yeem downshift hauv qab lub zog.
4. Loj tsis zoo dua
Kev thawb lub iav loj heev yog tawv ntawm ob txhais ceg thiab tuaj yeem ua rau nws nyuaj rau kev sib tham txog txoj kev taug kev xws li cov hauv paus hniav thiab stumps, thiab kom rov zoo tom qab kev poob siab ntawm kev tuav.
Roob tsheb kauj vab gear ratios
Iav ntau qhia koj qhov txawv ntawm qhov siab tshaj plaws thiab qis tshaj iav ntawm koj lub cassette. - Andy Lloyd / Peb Media
Tus naj npawb ntawm cov iav ntawm koj lub cassette tsis txhais tau ntau yog tias nws tsis muaj ntau yam iav.
Qhov ntau ntawm lub cassette yog txiav txim siab los ntawm kev faib cov hniav ntawm cov cog loj tshaj plaws los ntawm cov hniav ntawm qhov tsawg tshaj plaws.
Siv lub 12-SRAM ceev GX Eagle T-Type cassette, piv txwv li. Qhov no muaj cov iav ntau ntawm 10t txog 52t, yog li peb tuaj yeem txheeb xyuas nws cov iav piv siv cov qauv hauv qab no:
52/10=5 2=520% ntau
Yog li, qhov twg chainring xaiv los ua si? Raws li peb tau tsim, koj xaiv lub cassette txiav txim siab lub iav ntau yam ntawm koj 1x drivetrain. Los ntawm kev xaiv koj chainring, koj tuaj yeem hloov lub gearing nce lossis nqis, nyob ntawm koj nyiam.
Ib tug me me chainring, xws li ib tug 28t los yog 30t, yuav muab rau koj tus qis tshaj (yooj yim tshaj) iav rau nce toj. Ib tug loj chainring, xws li ib tug 34t los yog 36t, yuav pab tau koj pedal sai nyob rau hauv lub siab tshaj plaws (nyuaj) iav.
Feem ntau cov tsheb kauj vab roob tuaj nrog 32t chainring raws li tus qauv, vim nws muab cov khoom nruab nrab hauv av.
Yog tias koj xav paub seb qhov iav piv koj tab tom khiav, koj tsuas yog yuav tsum faib cov hniav ntawm koj cov chainring los ntawm cov hniav ntawm koj xaiv cov cog tom qab.
Piv txwv li, yog tias koj muaj ib tug 10-52t cassette thiab ib tug 32t chainring, thiab xav ua hauj lwm tawm koj lub iav piv nyob rau hauv koj tus qis tshaj thiab siab tshaj iav, qhov sib npaug yuav ua raws li nram no:
Lowest gear ratio: 32/52 = 0.615
Highest gear ratio: 32/10 = 3.2
Tam sim no, cia peb saib ceev ceev ntawm cov iav piv ntawm cov laus 2x10 tsav tsheb, xws li Shimano's 2013 SLX. Tom qab ntawd, lub tsheb ciav hlau tuaj nrog ib txheej ntawm 38/24t chainrings thiab ib qho 11-36t cassette.
Siv cov qauv zoo ib yam li saum toj no, peb tuaj yeem ua haujlwm tawm lub cassette lub iav ntau yam, thiab qhov qis tshaj plaws thiab siab tshaj iav piv ntawm cov tsav tsheb.
Iav ntau yam ntawm 11-36t cassette:36/11=3 27=327% ntau
Lowest gear ratio: 24/36 = 0.666
Highest gear ratio: 38/11 = 3.45
Vim li cas kuv cov iav tsis ua haujlwm zoo?
Kev tu thiab tu kom zoo yog qhov tseem ceeb rau kev ua kom koj lub zog ua haujlwm zoo. - Halfords
Raws li nrog rau tag nrho cov roob tsheb kauj vab, kev saib xyuas tsis tu ncua yog qhov tseem ceeb los ua kom koj lub zog khiav zoo.
Kev tu thiab lubricating koj lub tsheb ciav hlau tom qab txhua lub caij tau pom zoo, tab sis txawm tias muaj kev saib xyuas zoo tshaj plaws tseem muaj ob peb yam uas tuaj yeem ua rau koj lub zog ua haujlwm zoo tshaj plaws.
Cov iav iav tshiab tau raug cuam tshuam rau cable stretch, qhov twg cov iav cable loj hlob nyob rau hauv load thaum nws thawj ob peb siv. Ib tug stretched cable yuav ua rau inconsistent thiab vague hloov, thiab feem ntau yuav kho tau los ntawm kev siv lub chim adjusters ntawm lub shifter los yog derailleur rau tension lub cable.
Qee zaum, lwm yam teeb meem tuaj yeem tshwm sim vim hnav thiab tsim kua muag thaum caij tsheb, xws li derailleurs tau khob tawm ntawm kev sib tw lossis txwv cov ntsia hlau xav tau rov kho dua. Hauv qhov no, siv sijhawm los ntsuas koj lub zog yuav zoo li kho qhov teeb meem lossis qhia txog qhov yuav tsum tau ua los kho nws.
Cov saw hnyav hnyav kuj ua rau kev hloov pauv tsis zoo, thiab ua rau koj muaj kev pheej hmoo ntawm cov saw hlau snapped. Kev siv cov saw hlau txuas ntxiv kuj tseem ua rau kev hnav ntawm qhov seem ntawm koj lub tsheb ciav hlau, yog li nws yog ib qho tseem ceeb uas yuav tsum tau nyob rau saum toj ntawm nws los ntawm kev kuaj xyuas tsis tu ncua yog tias koj cov saw xav tau hloov.
Dab tsi yog cov txiaj ntsig ntawm hluav taws xob MTB tsav tsheb?
Tsis muaj kab nyob ntawm no. Hloov chaw, lub derailleur yog siv los ntawm lub roj teeb me me thiab tswj ntawm Bluetooth. - Andy Lloyd / Peb Media
Raws li qhov tseeb innovation nyob rau hauv roob tsheb kauj vab gearing, muaj ntau hype ib puag ncig wireless hluav taws xob tsav tsheb.
Qhov txiaj ntsig tseem ceeb ntawm kev hloov hluav taws xob hauv cov khoom siv hluav taws xob yog qhov sib xws. Iav cables tuaj yeem ncav cuag lub sijhawm, txhais tau tias lawv yuav tsum tau rov tensioned thiaj li muab kev hloov pauv.
Kev hloov hluav taws xob, ntawm qhov tod tes, yog qhov tseeb thiab meej txhua lub sijhawm. Thaum txhim kho kom raug, nws yuav tsum xav tau me ntsis kom tsis muaj kev hloov kho.
Kev hloov pauv tshwm sim yuav luag tam sim ntawm lub tsheb ciav hlau wireless, ua rau cov neeg caij tsheb hloov nrawm dua thiab raug ntau dua ntawm cov txheej txheem ntawm txoj kev.
Wireless drivetrains tuaj ntawm tus nqi siab heev, txawm hais tias peb tab tom pom cov thev naus laus zis qeeb qeeb rau cov kev xaiv pheej yig dua.
Koj tseem yuav tau nco ntsoov kom paub tseeb tias koj cov roj teeb tau them ua ntej tawm mus rau kev caij tsheb, lossis pheej hmoo yuav daig hauv ib lub iav yog tias koj khiav tawm ntawm cov kua txiv hmab txiv ntoo.
Yuav ua li cas rau roob tsheb kauj vab gearboxes?
Gearboxes tuav ntau cov lus cog tseg, tab sis tseem muaj qee txoj hauv kev mus ua ntej lawv pib ua qhov kev xaiv nrov. - Mick kirkman / Media tam sim
Av av, av nkos thiab grime tuaj yeem ua rau muaj kev puas tsuaj rau cov tsheb kauj vab hauv roob. Gearboxes, ntawm qhov tod tes, tau kaw tag nrho thiab kaw los ntawm cov khoom. Yog li vim li cas lawv tsis tau tuav ntawm lub lag luam tseem ceeb MTB?
Yuav kom siv tau rau hauv roob tsheb kauj vab, gearboxes yuav tsum tau mounted rau lub thav duab hauv qab bracket cheeb tsam. Tsheb-hub iav (raws li pom ntawm qee lub nroog tsheb kauj vab) tsis muaj lus nug vim lawv qhov hnyav tsis zoo. Qhov no xav tau rau ib tug kev cai gearbox-tshaj thav duab tsim thawj barrier.
Gearboxes kuj hnyav dua li cov tsav tsheb sab nraud thiab tuaj yeem ua kom pom tseeb. Shifter ergonomics tseem tsis zoo piv rau cov khoom siv niaj hnub no thiab koj tuaj yeem hloov pauv thaum coasting.
Txawm li cas los xij, nws nyuaj rau tsis kam lees lawv cov kav ntev, tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej nyuaj. Tshem tawm qhov hnyav ntawm derailleur thiab cassette los ntawm lub log tsheb kuj tseem txhawb nqa kev ncua kev kawm tau zoo heev.
Thaum lawv muab cov txiaj ntsig tau txais txiaj ntsig, tseem muaj qee qhov kev txhim kho tseem ceeb uas xav tau ua ntej peb tuaj yeem pom cov gearboxes nyuaj tsav sab nraud raws li tus qauv MTB tshiab.
