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Ships within 48 hours · Estimated delivery Jul 19 - Jul 24
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Description
Shimano EW-JC304 Di2 Junction Box - 4 Ports, Use With EW-SD300Shimano Di2 Frame Junction Box Frame Junction Box connects via SD50 E tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and battery mount All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions Use Di2 system checker to update component firmware from http: e tubeproject. shimano. com Product Specifics Today's Stock
Shimano Di2 Frame Junction Box- Frame Junction Box connects via SD50 E-tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and battery mount
- All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
- Use Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/
Product Specifics
Today's Stock Status
10+ Available to ship in 2-4 Business Days
UPC: 192790597195
EAN: Not available
Manufacturer Part Number: Does Not Apply
CY8903
154993-Q0-L
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 5
All cotton. No swamp butt in this heat
Color: Black&grape Purple&ash Gray&white&pink&beige, Size: Medium
Absolutely love these!! All cotton, breathable and comfortable. A little too high waisted but I was expecting boy shorts not briefs. The front crotch seam is weird but doesn't show. Neither does anything else 😀
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Reviewed in the United States on May 22, 2026
★★★★★ 5
True to description
Color: Black&grape Purple&ash Gray&white&pink&beige, Size: Medium
I loved them, they are very comfortable! I got them medium and they fit perfect! They do come a little small though.
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Reviewed in the United States on May 19, 2026
★★★★★ 5
Great product.
Color: Black&grape Purple&ash Gray&white&pink&beige, Size: Large
Fast shipping, nice material, great price and good fit.
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Most comfortable underwear EVER!
Color: Black&grape Purple&ash Gray&white&pink&beige, Size: X-Large
As close to an actual men’s boxer brief you can get. Soft and stretchy but maintains their shape. The legs aren’t too tight and they don’t roll up and the waist doesn’t roll down. The box says to hand wash but who has time for that? They washed and dried just fine.
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Reviewed in the United States on April 30, 2026
★★★★★ 5
Super soft and comfortable!
I haven't bought new underwear in forever. I used to wear thongs, but now find them incredibly uncomfortable. The last few times I've tried to buy new underwear, the sizing was either way off (I'm a medium, but gave up after having to return them for a large and then extra large) or the quality was horrible (two brands stretch waaaay out and they can fall down while wearing them (I have larger ass-ets, so they shouldn't start to slide down during use). I tried these after buying some bamboo pyjamas and I love them! They are incredibly soft, comfortable, and stretchy. I can use them all day, and they work well, whether I'm lounging on the couch or wearing them under my spandex shorts at the gym, they don't ride up or slide down. They are both comfortable and look sexy, while providing support in all the right places. I haven't had them too long, so I can't speak on the durability, but they appear to be of good quality and I plan to order more, this time without the band.
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Reviewed in the United States on November 13, 2025