Shimano UN55 73 x 122.5mm Square Taper English Bottom Bracket
Shimano UN55 73 x 122.5mm Square Taper English Bottom Bracket
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SKU:EBBUN55C22
Shimano UN55 73mm x 122.5mm Square Taper Bottom Bracket is designed for JIS square-taper cranksets and provides smooth performance. This bottom bracket features a hollow spindle and is constructed with a durable silver-colored aluminum. It has a spindle interface of square taper JIS, a BB shell width of 73mm and a bottom bracket shell I.D of 1.37. The spindle length is 122.5mm and compatible with BB/Frame Interface of English. This bottom bracket comes with a weight of 330g and the crank arm fixing bolts are not included.
- Spindle Interface Type: Square Taper JIS
- BB Shell Width (mm): 73
- Bottom Bracket Shell I.D.: 1.37
- Spindle Length: 122.5
- BB/Frame Interface: English
- Defined Color: Silver
- Weight: 330
What Size?
Finding the right size bicycle is important for a comfortable and enjoyable ride. There are various frame sizes available that are designed to fit riders of different heights, as well as different wheel sizes and frame styles. To choose the best fit, you can look at the sizing and geometry chart provided by the manufacturer. This will show you the seat tube length and top tube length, which can affect the stand-over clearance and comfort of the bike. You want to aim for a comfortable position that isn't too cramped or stretched out. If you have any questions about finding the right size bike for you, our team of experts is always happy to help.
| Child height (Inch) |
Child height (cm) |
Wheel size |
|
2’9”-3’1″ |
85-90 cm cm | 10/12 inches |
| 3’1”-3’3″ | 90-100 cm | 12/14 inches |
| 3’3”-3’7″ | 100-110 cm | 14/16 inches |
| 3'7"-3'8" | 110-115 cm | 16/18 inches |
| 3’8”-4’0″ | 115-120 cm | 18/20 inches |
| 4'0”-4’5″ | 120-135 cm | 20/24 inches |
| 4'5"-4'9" | 135-145 cm | 24/26 inches |
| 5 inches+ | 145 cm + | 26 inches |
|
Adult height (Inch) |
Frame Size (Inches) | Frame size |
| 4'10-5'2" | 13 - 14" | X-Small |
| 5'2-5'6" | 15 - 16" | Small |
| 5'6-5'10" | 17 - 18" | Medium |
| 5'10-6'1" | 19 - 20" | Large |
| 6'1-6'4" | 21 - 22" | X-Large |
| 6'4-6'6" | 22 - 24" | XX-Large |
|
Adult height (Inch) |
Frame Size (Inches) | Frame size |
| 4'10-5'2" | 47-48 cm | XX-Small |
| 5'2-5'6" | 49 - 50 cm | X-Small |
| 5'3-5'6" | 51 - 53 cm | Small |
| 5'6-5'9" | 54 - 55 cm | Medium |
| 5'9-6'0" | 56 - 58 cm | Large |
| 6'0-6'3" | 58 - 60 cm | X-Large |
| 6'3-6'6" | 61 - 63 cm | XX-Large |