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Shimano Acera M3020 rear derailleur, 7/8-speed, super long cage (SGS)

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Shimano Acera M3020 derailleur

SHIMANO ACERA M3020 rear derailleur with Double Servo technology for precise shifting with a wide range.
Product features
Derailleur capacity: 45 teeth
For a cassette with the largest pinion of 40 teeth
Product details
Groupset Shimano Acera
Gears 1x8, 2x8, 3x8, 1x7, 2x7, 3x7
Cage type SGS super long cage
Mounting type direct screw mounting
Capacity 45 teeth
Max pinion size 40 teeth
Material aluminium, steel
Weight 332 g
product ID 183116
Product rating  (45 ratings)
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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

HU Elektromos kerékpárjainkra vettem (2 gépre), mert az eredeti gyári váltók gyengébb minőségűnek bizonyultak. Felszerelésük után azonnal érezhető volt a különbség. Pontosan váltanak, csendes működésűek. Természetesen szükség volt a lánc teljes útjának pontos beállításara is, de amióta ezt használom, fele részben nincs is szükség a elektromos rásegítés használatára, a kerékpárom a jobb erőátvitelnek köszönhetően könnyebben halad, mondhatni suhant mint a szél. Jobban oda tudok figyelni a nyíló tavaszi virágzásra, és a gyönyörű tájra, az elég vacak bicikiút ellenére is. Nagyon boldog vagyok, örülök hogy megvettem a terméket. Párom is örül. Szép napot kívánok szeretettel

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

A very interesting derailleur, I would say that for the money such a small miracle. I used on an old TREK 4300 (converted to a gravel bike) when going from 3x8 to 1x8. It handles the 11-42 cartridge without any problems (even without additional extension and adjustment) and adjusts beautifully - cleanly, quietly, smoothly. In my opinion, it can also handle 1x10 with an 11-42 cartridge. Of course, I won't put my hand in the fire for that, but I judge by the extent of the side stops. Would like to try it.

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SK MTB 10-rychlostne radenie ma iny tah lanka (DynaSys).

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SK Na YT je video s cestným radení na 1x10 a tuším 11-42. Ale pre MTB asi (SH určite) nie je radenie kde by sedel ťah tak aby chodila na 10s.

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SK Funfuje to preto, lebo Shimano Road 10sp. prehadzovacky maju ten isty prevod 1.7 ako Shimano MTB 7-8-9 sp. prehadzovacky.

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SK Môže byť. Dopodrobna som to neštudoval. Ak samozrejme nezodpovedá krok prehadzovačky s MTB SH 10-rýchlostnou pákou krokom 10-rýchlostnej kazety, tak sa to použiť nedá.

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

Only after the purchase did I find out that behind the modern name RD-M3020 is the old RD-M430, with an identical 22mm offset guide pulley, on which they only lengthened the B-bolt and moved its mount a couple of degrees so that the derailleur can handle a 40-tooth sprocket.

=> If you have an old RD-M430 at home, put a B-bolt a few mm longer in it and it will handle 40 teeth like this "new" RD-M3020.

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

I positively evaluate the all-metal construction and the range of gears that this cheap derailleur can handle.
I put a 1x9 conversion on a 26" MTB with an 11-40 cassette.
I can confirm that this cartridge can be operated without any problems and also that it can fire 9-round rounds accurately enough (even though it is only declared for 7/8-round rounds).

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

RO Foarte bun,calitate superioara,pret perfect pentru oricine as spune,cumparati cu incredere,servicii de o calitate foarte buna,prompti cu livrarea,foarte bine ambalat,a venit in stare perfecta

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

In exchange for the old Alivia. They are still waiting for installation, but they look great. The price is also great.
There are just too many 8-quality ones

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

Tourney kit upgrade where my son broke the derailleur arm. Even with the lower Shimano series, the quality is recognizable.

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

I haven't put it on yet, but it's Shimano and that's always reliable, regardless of the position in the set hierarchy.

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

The derailleur is ripe for conversion to a children's 24 bike with an 11-42 cassette and extension.

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

The quality is ok, especially helpful when driving uphill for a 12-year-old son with larger wheels

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

Thrown on an old bicycle, it served its purpose

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

The derailleur pedals as it should. Satisfaction

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

For the price, reliable and fully functional.

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Product questions
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SK Táto prehadzovačka je primárne určená skôr pre 8-kolečko s kazetou s väčším rozsahom. Nevieme presne, akú kazetu máš vzadu (počet zubov najmenšieho pastorku a najväčšieho pastorku), ale z obrázku usudzujem, že sa bude jednať o kazetu s rozsahom 12-32 alebo podobnú a asi vhodnejšia prehadzovačka by mohla byť táto:
https://www.mtbiker.sk/shop/komponenty/prehadzovacky/mtb-7-8-9-rychlostne/shimano-altus-rd-m310-prehadzovacka-7-8-kolo-dlhe-ramienko-gs-cierna-p181052.html?itm_medium=widget&itm_campaign=
alebo
https://www.mtbiker.sk/shop/komponenty/prehadzovacky/mtb-7-8-9-rychlostne/shimano-tourney-tx-tx800-prehadzovacka-7-8-kolo-dlhe-ramienko-p203634.html?itm_medium=shop&itm_campaign=personal-product-recommendation#description

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SK Dobry den,

8-rychlostne prehadzovace su (az na vynimky) kompatibilne aj medzi MTB a Road Shimano sadami - prehadzovac by tak mal fungovat aj s Claris pakami, v pripade presmykacov vsak nie.
Z predlzovacim hakom je to vzdy trosku otazne - vyladenie moze vyzadovat trochu viac trpezlivosti, kedze sa nejedna o standardny setup, podla specifikacie SunRAce by to vsak malo spolu sediet.

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

SK Dobrý den, mám 1-převodník (34) a vzadu kazetu CS-HG400-8 (11-40T).
Bude na to, prosím, stačit tato přehazka:
(Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)
Děkuji za odpověď

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SK Dobry den prajem,

ano, podla specifikacie vyrobcu nebude s pouzitim kazety s rozsahom 11-40T ziadny problem

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

Good day, I recently bought from you the 8th cassette cs hg50-34t as well as a new chain. There is a 3-coil in the front of the mtb. Now I need a new rear derailleur. Flood is Shimano alivio see photo. What can you recommend. Thank you Roman

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

SK Dobry den, mam prehadzovacku Shimano Acera vid obrazok a 8 rychlostnu kazetu T34. Chcem vyměnit kazetu z vacsim rozsahom zubov napríklad: T40 alebo T45, bude to fungovat alebo musim menit aj prehadzovac? Dakujem

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SK 40-42t nie je problém, odskúšanú osobne mám 11-42t. Pri tej 45t už si istý nie som. S predĺžením (goat link) by to mohlo chodiť za cenu nejakého zhoršenia radenia na vyšších kvaltoch.

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SK tl-unicorn si možno nevšimol, že Vy máte iný (starší) typ, ako ten, pod ktorým si píšeme.
Ak sa nemýlim, Vaša prehadzovačka je stará dobrá 360-tka; táto: https://www.mtbiker.sk/shop/komponenty/prehadzovacky/mtb-7-8-9-rychlostne/shimano-acera-rd-m360-prehadzovacka-7-8-kolo-super-dlhe-ramienko-sgs-strieborna-cierna-p8279.html#questions
Z praxe mám odskúšané, že 34 zubov na najväčšom pastorku kazety je jej maximum.
Môžte si pozrieť i otázky a odpovede pod vyššie uvedeným linkom.
Prehadzovačka Acera M3020, je trochu zmodernizovaný typ; má väčšiu kapacitu a "znesie" i väčšie koliesko na kazete.

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

SK Dobrý deň mám CTM koyuk 1.0 je osadený sadou Claris. Chcem sa spýtať či by bolo možné nahradiť Claris prehadzovačku za túto respektíve či by to bolo kompatibilné s Claris radením. Za odpoveď ďakujem.

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SK Dobry den prajem,

ano, prehadzovacku mozete pouzit, Shimano cestne a MTB 7/8-rychlostne sady vyuzivaju rovnaky pomer tahu lanka (1,7:1)

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SK Takto to mam na Kellys Soot 30, odkedy tato prehadzovacka existuje. Funguje to ok 11-40 kazetou hg400.

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

SK Dobrý takže popočital som kazetu je to 7 kolečko 12/27 zúbkov a kazeta je shimano CS-HG200-7 a k tomu by som potreboval prehadzovačku ...
veľmi pekne vám ďakujem za pomoc

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

SK Otázka: bude fungovať táto prehadzovačka keď vzadu bude kazeta shimano 11-40z a v predu bude 3prevodník 48-38-28?Lebo v tomto prípade bude kapacita už 49z...

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SK Dobry den,

skor by som povedal, ze uz zial nie, kapacita ramienka je vyrazne nizsia, minimalne niektore kombinacie prevodov nepojdu zaradit.

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SK Narazil som na rovnaky problem. Chcel by som osadit HG400, ale kapacita vychadza az 49. Aku prehadzovacku pouzit? Mal som altus m370 SGS, ale radenie nebolo moc presne. Neslo nastavit. Co tam dat? Diky.

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SK Dobry den,

aky mate presne setup - rozsah kazety, pocet a velkost prevodnikov? Zial v tychto 7/8-speed prevedeniach je standard kapacita skor na hranici 41-43 zubov, vynimocne 45, vacsiu som v ponuke ziadneho z vyrobcov nenasiel.

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SK Zdravim, vpredu mam 28-38-48, vzadu by som chcel HG400 11-40. Kapacita mi vychadza 49. Mam Shimano TX800 a Altus M370SGS. Viem, ze by som ho musel vymenit za nieco ine, ale nic co by bolo vhodne som nenasiel.

Asi prejdem na Microshift Acolyte, kde by som mohol ist do kombinacie CS-H083 12-46 a RD-M5185M s dlhym ramienkom. Snad to bude fungovat s presmykacom TX800.

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SK Hm, žiaľ, máte pravdu.
Výrobcovia na nás, ktorí chceme mať "trojpílu" a vzadu veľkú kazetu, aby sme mohli normálnou rýchlosťou a bez šialeného prepletania nohami ísť po ceste, a potom vyjsť aj do strmšieho kopca, vôbec nemyslia.
Nechce sa mi veriť, že by sa nedala navrhnúť a vyrobiť prehadzovačka s kapacitou 50 zubov.
Súdiac z radu otázok v tomto vlákne, nie som sám, kto čosi také hľadá.

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SK Dobrý deň, mám podobnú otázku na funkčnosť tejto prehadzovačky, len vpredu je 3 prevodník s menším rozsahom 24-34-42 a kazetu by som chcel HG400 8kolo 11-40 T. Pôvodne je to Merida Matts s kazetou 8kolo 11-30 T, pokiaľ nie, tak prosím odporučiť inú kazetu 8kolo s max. viac ako 30T. Alebo vymením aj vpredu za 2 prevodník Deore 24(26)/xx T? Cieľom je ľahší prevod do kopcov, s pomerom tak 1,5 +. Teraz je to max 30/24T. Prešmykač je pôvodný suntour xr180, radenie pôvodné. Ďakujem.

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SK Dobry den prajem,

11-40T kazetu bude uz opat mierne nad hranicou kapacity ramienka prehadzovacky - avsak cely system teoreticky moze stale fungovat fajn, ale tazko to odhadnut s absolutnou istotou. Bezproblemove bude urcite pouzitie kazety s rozsahom 11-34 alebo 11-36T, napr.: https://www.mtbiker.sk/shop/komponenty/kazety-a-pastorky/mtb-7-8-9-prevodov/microshift-h-series-cs-h082-kazeta-8-kolo.html#492004 alebo https://www.mtbiker.sk/shop/komponenty/kazety-a-pastorky/mtb-7-8-9-prevodov/shimano-hg50-kazeta-8-kolo-11-34t.html. Prip. podla udavanej kapacity ramienka (45T) bude pouzitelna aj kazeta s max. 38T pastorkom - https://www.mtbiker.sk/shop/komponenty/kazety-a-pastorky/mtb-7-8-9-prevodov/microshift-acolyte-kazeta-8-kolo-11-38t.html.

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

SK Dobrý deň , je možné nahradiť prehadzovačku Shimano Acera RDM3000SGS touto? V predu mám prevodník 42-34-24 a vzadu kazetu 11-34

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SK Ďakujem za radu ,
ak môžem ešte otázku , aký má význam keď mám vzadu 8 kolo že pôvodná aj vami navrhovaná je 9 speed ?

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SK Dobrý deň,

Vyberal som prehadzovačku podľa počtu rýchlosti aktuálnej prehadzovačky ktorú chcete nahradiť. Ak máte 8 rýchlostné radenie a keztu, vhodnejšia bude 8 rýchlostná verzia a teda môžete použiť túto Acera M3020

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

hello, I need advice on which derailleur model is suitable for a trek bike, rear cassette cs hg31 8 front 48 38 28

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

CS Dobry den chci se zeptat zda by mohla fungovat i na 9 rychlosni kazete 11-40t dekuji za odpoved.

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CS Dobry den,

zial nie, prehadzovacka nie je urcena pre 9-rychlostne kazety.

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CS a kdyz dam vedle sebe 8. cku a 9.tku tak su stejne siroke! ( kazety) tak by zo mohlo chotit! me ted na kazete 9. 11-36 chodi v pohode tato Shimano Altus RD-M310

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CS Dobry den,

problemom mozu byt kladky, su urcene pre sirsie 7/8-rychlostne retaze, 9-rychlostna retaz na nich sediet nebude spravne.

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CS sedi krasne!! mam na ni dokonce desitkovy retez a nema stim vubec problem!!

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CS Tak super, hlavne ze funguje teda k spokojnosti

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Variant Shimano Acera M3020 prehadzovačka, 7/8-kolo, super dlhé ramienko (SGS)

SK Dobry den, originalne nahradne kladky mate nedostupne, viete mi poradit alternativu?

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WARNING
For assistance with installation, adjustment and replacement of the products which are not found in the user's manual, please contact the place of purchase or a distributor. A dealer's manual for professional and experienced bicycle mechanics is available on our website (https://si.shimano.com).
For safety, be sure to carefully read this "user's manual" before use, follow it for correct use, and save it so that you can refer back to it at any time.
The following instructions must be always followed in order to prevent personal injury, physical damage to equipment and the surroundings. The instructions are classified according to the degree of danger or damage which may occur if the product is used incorrectly.
DANGER - Failure to follow the instructions will result in death or serious injury.
WARNING - Failure to follow the instructions could result in death or serious injury.
CAUTION - Failure to follow the instructions could result in personal injury, or physical damage to equipment and surroundings.

WARNING
- Do not disassemble or modify the product. It may cause the product to not operate correctly, and you may unexpectedly fall and be seriously injured.
- Never use alkali or acid-based solvents such as rust removers. If such a solvent is used, the chain may break and cause serious injury.
- Clean the chain regularly with an appropriate chain cleaner. The maintenance intervals depend on the circumstances of use and riding.
- Check that the chain is not damaged (deformation or cracking), skipping, or exhibiting any other anomalies such as arbitrary gear shifting. If any problems are found, consult the place of purchase or a distributor. The chain may break and you may fall.

Japanese manufacturer produces road, mountain, gravel, trekking, BMX and e-bike groupsets. They also offer a whole series of components and apparel. Their range goes from wheels, footwear, eyewear to backpacks. Shimano is a traditional manufacturer known for their quality work, which is why they are the favourite choice of amateurs and professionals.

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