Park Tool BBT-79.3 Bottom Bracket Tool
Park Tool BBT-79.3 Bottom Bracket Tool
The Park Tool BBT-79.3 is a precision CNC-machined aluminum tool for the installation and removal of select threaded bottom brackets with 12-notch fittings. Designed for bike mechanics and enthusiasts, this tool is manufactured in-house by Park Tool and features an anodized finish for easy identification. With a ratchet/torque wrench-compatible 3/8" drive, this tool is perfect for precise and efficient bottom bracket maintenance and repairs. It is compatible with the Park Tool BBT-RS Bottom Bracket Tool Retaining System (sold separately) which uses an adjustable spring-based tension system to apply consistent and adjustable pressure to the tool, ensuring full engagement with the tool fitting and preventing slippage.
This tool fits 12-notch threaded bottom bracket tool fittings with a major diameter (outside of notches) of 45-47 mm and a minor diameter (inside of notches) of 44 mm, including: SRAM BSA DUB, Race Face Cinch, Rotor BSA30, Zipp Vuma, Hawk Racing BB3086, and more. It also features a 3/8" drive fitting which makes it easy to use with a standard wrench or socket.
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)
||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|
|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|
What is the option to pay in installments on Shop Pay?
Shop Pay is a payment option that allows you to split your purchase amount into smaller installments. You can pay now or later, with options for biweekly payments with 0% APR or monthly payments with no hidden or late fees. Shop Pay Installments is only available to customers with a US billing address and phone number, and there is a $17,500 USD limit on purchases. You can use debit or credit cards for non-interest bearing orders, and only debit cards for interest bearing orders.
If you make a return on a purchase made with Shop Pay Installments, the refund will be processed and appear on your payment schedule within 3-10 business days, and your balance will be updated. There are no late fees for missed payments, but they may impact your credit score or future eligibility for Shop Pay Installments.
For instance, a $800 purchase could be split into 12 monthly payments of $72.21 at 15% APR, or 4 interest-free payments of $200 every 2 weeks.
Rates from 0% APR or 10-36% APR. Payment options through Shop Pay Installments are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. State notices to consumers affirm.com/licenses.
If you have questions about Shop Pay Installments, you can visit the Affirm support website.
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