Maximize your bike's carrying capacity with the Topeak Beam Seatpost Rack MTX V-Type for Large Frames! This rack fits seatposts ranging from 25.4 to 31.8mm and is designed for larger frames. The tough 6061 T6 aluminum construction is built to handle up to 20 lbs of gear with ease. The hinged seatpost clamp with an aluminum quick-release lever makes it simple to remove for weekend rides. Perfect for mountain and trekking bikes, the Topeak Beam Seatpost Mount Rack is an essential accessory for your next cycling adventure.
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.
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Kids Bikes:
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
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Mountain Bikes:
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
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Road Bikes:
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
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