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FSA

FSA Orbit NO.57BP-1 Standard-25mm Glossy Black - OD 50/62 head assembly, semi-integrated, OEM

-77%
4.89  -77%
RRP 20.99 
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From 18.06.2026 (Thursday) Check availability
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Internal head assembly designed for frames with a head tube:

  • upper part: with inner diameter 44 mm/outer diameter 50 mm
  • bottom: with inner diameter 55 mm/outer diameter 62 mm
  • fork stem 1 1/2" - 1-1/8"
  • ball bearings
Product details
Fork neck conical (tapered) 1 1/8" - 1.5"
product ID 234833
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The material is fine except for the bearings. I prefer integrated ones, so I prefer FSA Orbit

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Product questions
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SK Ahoj, bohuzial neviem to zmerat ... bojujem s "koroziou" medzi predstavcom a krkom vidlice ... je to tak "zapečené" ze to nejde demontovat..., ale na 99% si myslim ze rám bude mat vnutorny priemer 30.0mm (JIS standard) alebo 30.2mm (ISO standard) ... je to Fondriest ram material cro mo od Columbusu ... rok 1996. Obavam sa ze to bude nemozne s tym "redukcnym zlozenim" kedze dnesny rozmer 1" 1/8 = cca 28,6mm a tym padom mi tam zostava velmi malo miesta na misky ... hmm? Co myslis najde sa taky "zazrak" ? Dakujem, Erik

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SK Ahoj,

veru tak ako pises, do 30.0 mm (rovnako aj do 30.2 mm) hlavovej trubky das max 25.4 mm krk, resp. prislusne 25.4 mm hlavove zlozenie, na osadenie misiek, ktore by umoznovali montaz sirsieho krku tam jednoducho nie je fyzicky miesto.

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SK Dakujem, za podporu ,.. dufal som ze niekto to uz vymyslel chapem ze klasicku misku do vnutra aleho priemru nedostanem ... ale dufal som ze su mozno "vonkajsie" misky ... a samotna hrana trubky ramu by tvorila "end point" ktory by nepustil pri stiahnuti krku a predstavaca dalej tie misky s loziskami ... Ale asi to nie je take jednoduche, neviem nic take vygooglit okrem nazorov kopec ludi co by to privitalo taketo riesenie ... umoznilo by to osadit vintage ram s modernymi dielmi ... V kazdom pripade este raz Ti dakujem, za podporu. Erik

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SK Ono nie ze to nikto nevymyslel - ono to ani nikto nikdy nevymysli Nie je to fyzicky mozne, toho priestoru tam je strasne malo, musis tu misku proste nalisovat/osadit dovnutra hlavovej trubky, a z hladiska bezpecnosti bude jej stena extremne tenka, aj keby malo ist co i len o ocelovy variant - okolo krku bude menej ako 0.6-0.7 mm miesta, to je zial hrozne malo.

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SK To chapem, len to hovorime stale o "klasickej" miske ktoru lisujes do vnutra ... a ja som dufal ze existuje miska ktoru nalisujes na vonkajsiu stranu ramu ... (i za cenu poskodenia farby, alebo jej odstranenia pod miskou ... ) a tym padom by ti zostal cely cisty priemer 30mm vnutorneho priestoru ...

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SK To si tazko predstavit - misky su pomerne hlboke, nebolo by tam dost priestoru najma v okoli hornej a spodnej ramovej trubky

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SK Mas dobre oko, aj to som meral ... nie je tam vela miesta rozhodne nie tak hlboko ako su zapustene misky vo vnutri ... je to skrabanie okolo celej hlavy ci ako sa to hovori ... asi sa zameriam na nejaku vidlicu a nasledne jej redukciu na predstavec ...

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SK Ahojte, hladam "redukčné" hlavové zlozenie ktore by do starsieho cestneho ramu (1" krk vidlice) umoznilo nainstalovat "modernu" vidlicu s krkom 1 1/8" , mate take redukcne zlozenie prosim? Dakujem

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SK Ahoj,

dolezity je v tomto pripade priemer hlavovej trubky Vasho ramu - viete nam poskytnur prosim vnutorny priemer? Dakujem.

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SK Dobry den, je toto zlozenie urcene pre rovnu alebo tapered vidlicu? Kedze v popise pise "rovný 1 1/8" " ale potom tam su tapered rozmery. Dakujem za odpoved.

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SK Dobrý deň, vďaka za otázku - naozaj sa v tomto prípade už jedná a hlavko určené pre tapered vidlice, popis upravíme.

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