180MM LENGTH - 42MMØ 20R TAPERED HEAD TUBE - FOR IS42/52 HEAD SET
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180MM LENGTH - 42MMØ 20R TAPERED HEAD TUBE - FOR IS42/52 HEAD SET
THIS 4130 MACHINED HEAD TUBE IS MADE TO EXCEPT IS42 UPPER AND IS52 LOWER HEAD SET INTEGRATED BEARING. USING VARIOUS HEAD SETS TO WORK WITH 1-1/8 OR TAPERED 1-1/8 TO 1-1/2 STEER TUBE
180MM LENGTH +.5/-0
UPPER HEAD TUBE IS 45MM OD AT RACE , TOP HEAD TUBE TO END OF UPPER RADIUS 8MM LONG
LOWER HEAD TUBE IS 55MM OD AT RACE , BOTTOM OF HEAD TUBE TO END OF BEGIN 20MM RADIUS 22MM
CENTER TUBE SECTION 42MM OD - 140MM LENGTH
MAIN TUBE CENTER SECTION IS 1.5MM WALL THICKNESS
RACE ID ARE MACHINED FOR IS42 UPPER AND IS52 LOWER. HEAD SET WILL DROP IN PRE WELD/BRAZE . POST WELD/BRAZE BEST PRACTICE WILL BE TO REAM RACES FOR DISTORTION. USING ALUMINUM OR BRASS HEATSINK WILL GREATLY REDUCED DISTORTION AND REAMING.
10MM HEAD TUBE ESTIMATE WEIGHT 241 GRAMS
SKU - TBE-HT-42-52-R20-180