SKU: 74532484771

Shimano SM-EW90-B Di2 Junction A 5 Port for TT

Sale price$170.09 Regular price$188.99
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Ships within 48 hours · Estimated delivery Jul 27 - Aug 1

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Description

Shimano SM-EW90-B Di2 Junction A 5 Port for TTWith Shimano's simplified and improved front junction box (junction A) for 9070 Dura Ace Di2 and 6870 Ultegra Di2, you now have 5 ports for use with both drop bar and TT shifters simultaneously. The new 9070 unit utilizes a rubber strap that cleanly and aerodynamically fastens underneath the stem. Better still, the 5 port junction box has a charging port that makes it possible to charge both internal and external batteries without having to remove

With Shimano's simplified and improved front junction box (junction A) for 9070 Dura Ace Di2 and 6870 Ultegra Di2, you now have 5 ports for use with both drop bar and TT shifters simultaneously. The new 9070 unit utilizes a rubber strap that cleanly and aerodynamically fastens underneath the stem. Better still, the 5-port junction box has a charging port that makes it possible to charge both internal and external batteries without having to remove them from the bike. 

Shipping Notes
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Exchange/Return Notes
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SKU: 74532484771

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Chris 's opinion
Grantham, US
★★★★★ 3
Thin material
Color: Blue Dots Check, Size: X-Large
Just thin Bought Malberg shirt same time for $9 more but fabric was far superior
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Reviewed in the United States on May 22, 2026
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Doug Sargent
Alexandria, US
★★★★★ 5
Great polos at a great price
Color: Blue/White, Size: Large
Pleasantly surprised at the quality of these shirts. A bit heavier of a fabric then I anticipated but will be perfect for spring and fall. The size (large) was in fact large. :)
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Reviewed in the United States on March 8, 2026
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Amazon Customer
Waukegan, US
★★★★★ 1
Avoid. Very thick
Color: Black/Red, Size: Large
Avoid. This is a thick shirt. Can’t wear during summer
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Reviewed in the United States on November 21, 2025
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D. E. Washington
Bozeman, US
★★★★★ 5
Nice shirt
Color: Blue/White, Size: X-Large
Nice shirt
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Reviewed in the United States on April 16, 2026
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Erick L.
Carnegie, US
★★★★★ 5
Size up
Color: Teal01, Size: XX-Large
Great color, nice material, I’m usually buy xl but this shirt in 2xl fit terrific. It’s not loose either but just snug enough to look good
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Reviewed in the United States on May 25, 2026

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