Kľuky sa v dnešnej dobe líšia aj dĺžkou. Najklasickejšia dĺžka je 175mm ale v ponuke často krát nájdete aj rozmery 170mm, 165mm a 160mm. Priemer osy býva 19mm alebo 22mm. V poslednej dobe však nastal trend kľúk zo 24mm osou, ktorá sa hodí hlavne streetovým jazdcom. Podľa týchto priemerov osy sa do rámu kupuje rozmer stredového zloženia, ktoré je taktiež dostupné v 19mm, 22mm alebo 24mm prevedení.
In today's age, in addition to the spindle diameter, there is also a choice of crank length. You can choose cranks in lengths like 160mm, 165mm, 170mm, and 175mm. Shorter cranks can increase stability for certain tricks, while longer cranks may offer better acceleration. The current standard is a length of 170mm, which is considered a good middle ground.
The types of bottom brackets are divided into MID BB, SPANISH BB, EURO BB, and the now outdated USA BB. The choice of bottom bracket type should match the frame (the manufacturer always specifies the type), and the inner diameter should match the crank spindle.
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