Skip to content
YouTube
Instagram
Build a Custom Reynolds
Tubeset
Country/Region
United States (USD $)
United States (USD $)
Search
Supplies
School
About
News
Account
Search
Cart
Supplies
REYNOLDS® Tubing
View All Reynolds
Tubeset Builder
Main Tubes
Seat Tubes
Chainstays
Seatstays
Head Tubes
Fork Blades
Steerer Tubes
Small Frame Parts
View All Frame Parts
Dropouts
Bottom Bracket Shells
Brake Mounts
Cable Guides & Stops
Bosses & Eyelets
Binders
Rack Parts
Tools & Supplies
View All Supplies
Miter
File & Shape
Clean & Prep
Weld
Braze
Tools & Supplies
REYNOLDS®
School
—Coming 2026—
Framebuilding School
Fabrication & machining courses, design & fit workshops, and more. Coming soon.
Learn More
About
About Firsthand
Our Brands
Ordering Info & FAQs
NEW! Reynolds Primer
News
Main Tubes
—
Filter
83 products
Sort by
Featured
Featured
Best selling
Alphabetically, A-Z
Alphabetically, Z-A
Price, low to high
Price, high to low
Filters
Out of stock
Show
Hide
Material
Steel
66
Stainless Steel
8
3/2.5 Titanium
9
Category
Main Tube
83
Brand
Reynolds
83
Typical Use
Down Tube
59
Top Tube
24
Series
325
9
525
6
531
2
631
16
725
4
853
38
931
8
Outer Diameter
Oval
3
25.4mm (1")
6
28.6mm (1.125")
16
31.8mm (1.25")
19
34.9mm (1.375")
21
36mm
1
37.3mm
1
38.1mm (1.5")
9
41.3mm (1.625")
1
44mm (1.75")
4
56mm
2
Length (mm)
500-599
5
600-699
62
700-799
12
800+
4
Price
$
$
Sort by
Featured
Best selling
Alphabetically, A-Z
Alphabetically, Z-A
Price, low to high
Price, high to low
Apply
7 in stock
Reynolds
#AB112
531, 25.4, 8-5-8 x 635 Main Tube
Regular price
$18.99 USD
2 in stock
Reynolds
#BB112
531, 28.6, 8-5-8 x 650 Main Tube
Regular price
$25.50 USD
8 in stock
Reynolds
#AX5000
631, 25.4, 8-5-8 x 600 Main Tube
Regular price
$33.51 USD
Reynolds
#BX5048
631, 28.6, 8-5-8 x 565 Main Tube
Regular price
$28.47 USD
Sold out
9 in stock
Reynolds
#BX5050
631, 28.6, 8-5-8 x 635 Main Tube
Regular price
$28.47 USD
10+ in stock
Reynolds
#BX5053
631, 28.6, 9-6-9 x 635 Main Tube
Regular price
$28.47 USD
10+ in stock
Reynolds
#BX5054
631, 28.6, 9-6-9 x 565 Main Tube
Regular price
$28.47 USD
10+ in stock
Reynolds
#BX5124
631, 31.8, 8-5-8 x 680 Main Tube
Regular price
$29.23 USD
6 in stock
Reynolds
#BX5125
631, 31.8, 9-6-9 x 635 Main Tube
Regular price
$28.54 USD
6 in stock
Reynolds
#BX5125L
631, 31.8, 9-6-9 x 680 Main Tube
Regular price
$29.23 USD
10+ in stock
Reynolds
#BX5126
631, 31.8, 1.0-7-1.0 x 635 Main Tube
Regular price
$28.54 USD
3 in stock
Reynolds
#BX5128
631, 31.8, 8-5-8 x 635 Main Tube
Regular price
$28.54 USD
5 in stock
Reynolds
#BX5174
631, 34.9, 9-6-9 x 680 Main Tube
Regular price
$31.08 USD
Reynolds
#BX5175
631, 34.9, 9-6-9 x 635 Main Tube
Regular price
$29.64 USD
Sold out
5 in stock
Reynolds
#BX5177
631, 34.9, 1.0-7-1.0 x 680 Main Tube
Regular price
$31.08 USD
10+ in stock
Reynolds
#BX5178
631, 34.9, 7-5-7 x 650 Main Tube
Regular price
$29.63 USD
10+ in stock
Reynolds
#BX5191
631, 38.1, 9-6-9 x 680 Main Tube
Regular price
$35.14 USD
8 in stock
Reynolds
#BX5050L
631, 28.6, 8-5-8 x 680 Main Tube
Regular price
$29.23 USD
1
2
3
…
5
·
Next »
Your cart
Close
Close
Your cart is empty
Start shopping