What is meant by term 'RC' & 'FC' in case of a bicycle frame
08-23-17, 04:26 AM
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What is meant by term 'RC' & 'FC' in case of a bicycle frame
I came across a engineering drawing for one of the bicycle alloy frames (MTB).
There was mention RC distance on the drawing from BBS centre till the dropout dead centre towards rear and FC distance from BBS centre till imaginary fork dropout dead centre.
Can anyone tell me what is the full form of "RC" and "FC".
I know that totaling both the dimensions gives us wheelbase.
There was mention RC distance on the drawing from BBS centre till the dropout dead centre towards rear and FC distance from BBS centre till imaginary fork dropout dead centre.
Can anyone tell me what is the full form of "RC" and "FC".
I know that totaling both the dimensions gives us wheelbase.
08-23-17, 05:10 AM
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FC is "front center". RC is "rear center". They indicate how the bike is balanced and rider weight distribution since most riders will always establish a fixed saddle position relative to the bottom bracket.
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Originally Posted by LAJ
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08-24-17, 07:27 PM
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Originally Posted by kloud
I know that totaling both the dimensions gives us wheelbase.
Totaling RC + FC does not exactly result in wheelbase, unless the frame has 0 bottom bracket drop. Close but not quite a cigar.
08-24-17, 08:58 PM
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"Front center" is the distance from the bottom bracket to the front wheel axle. "Rear center" is the distance from the bottom bracket to the rear wheel axle.
Adding them together doesn't give you wheelbase unless the bottom bracket sits on a line between the two wheel axles; generally the bottom bracket is below that line, so FC+RC gives you something slightly bigger than the wheelbase.
Adding them together doesn't give you wheelbase unless the bottom bracket sits on a line between the two wheel axles; generally the bottom bracket is below that line, so FC+RC gives you something slightly bigger than the wheelbase.
08-24-17, 11:45 PM
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Originally Posted by Wildwood
Totaling RC + FC does not exactly result in wheelbase, unless the frame has 0 bottom bracket drop. Close but not quite a cigar.
Yes, my bad. I forgot to mention that the frame had near about zero BBS drop/raise.
08-25-17, 12:25 AM
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Originally Posted by rpenmanparker
FC is "front center". RC is "rear center". They indicate how the bike is balanced and rider weight distribution since most riders will always establish a fixed saddle position relative to the bottom bracket.
Originally Posted by HTupolev
"Front center" is the distance from the bottom bracket to the front wheel axle. "Rear center" is the distance from the bottom bracket to the rear wheel axle.
Adding them together doesn't give you wheelbase unless the bottom bracket sits on a line between the two wheel axles; generally the bottom bracket is below that line, so FC+RC gives you something slightly bigger than the wheelbase.
Adding them together doesn't give you wheelbase unless the bottom bracket sits on a line between the two wheel axles; generally the bottom bracket is below that line, so FC+RC gives you something slightly bigger than the wheelbase.
