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Shimano Ultegra BR-6403 Brake Shoe Set
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Shimano Ultegra BR-6403 Brake Shoe Set


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Mfg PartNum: Y83G98010
MSRP: $16.99
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Replacement Pads For Your Ultegra Caliper Rim Brakes

Gritty winter rim brake performance not quite what it used to be? Now is the perfect time to refresh those pads for renewed brake performance. Shimano Ultegra BR-6403 series brake shoes provide solid stopping power and long use for road cycling with caliper rim brakesets. Standard Shimano style non-replaceable nylon pad holders attach via hex bolt for secure rim braking.


  • Low rim-wear compound is designed for machined rims
  • Rubber/nylon construction
  • Compatible with Shimano-style caliper rim brakes
  • Attaches via hex-bolt
  • Intended use: road cycling
  • Sold as a pair, one pair per caliper. Two pairs replace both brakes
  • Weight: 52g

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.


Brake Type: Road Caliper 

Brake Pad Type: Caliper - Shimano/SRAM 

Brake Parts: Pads 

Hub Compatibility: Rim Brake 


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1 stars
Reviewed 10/14/2021
by Julian Davis
Cycling Enthusiast
West Kelowna Canada
Value Rating
Overall Rating
0 of 1 customers found this review helpful.
Excellent replacement

I used these pads for a Shimano 105 brakeset on my Gardin as well as a Modolo brakeset on a Bianchi. They worked perfectly and on the old alloy 700c rims and eliminated the squeal I was getting with other pads. I would definitely use them again.

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Reviewed 4/8/2021
by Deayne
Bay Area and Central California
Overall Rating
3 of 4 customers found this review helpful.
Great replacement breaks

I had an older pair of brake pads (Shimano 600) that I liked so I jumped at the chance to get the Shimano Ultegra's. They have performed excellently and because I do a lot of hill climbing when I descend, I feel safe with these pads.

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Reviewed 5/6/2019
by Anonymous
Daily Commuter
san Francisco
Value Rating
Overall Rating
4 of 8 customers found this review helpful.
Nice, but pads are not replaceable

Bought this execting to get metal shoe with replaceable pad like Ultegra road brakes, but this a a plastic shoe with the pad glued in - works fine, but not you wil have to change the whole thing when the pad wears out.

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Reviewed 4/8/2021
by William.Lonergan
Overall Rating
1 of 1 customers found this review helpful.
Good shoes

I installed shimano BR-6403 brake shoes on my bike that I purchased from BTD, good stopping power & a nice clean look I'm satisfied

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Reviewed 12/29/2012
by GEA commuter
Competitive Racer
Lake Oswego
Value Rating
Overall Rating
6 of 9 customers found this review helpful.
Not very good on a commuter bike...

Lasted 300 miles in Oregons fall weather.

I used the pads on my single speed commuter... The fall weather in Oregon is not the greatest conditions for any brake pad... I ride pretty hard and of course brake hard too. I expected to get a little more wear out of these value pads, but they did a good job slowingstopping the bike. Might be better in summerdry conditions

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Reviewed 4/11/2017
by Anonymous
Overall Rating
2 of 3 customers found this review helpful.
Cost effective replacements

While they are not exact replacents for ultegra calipers they are a good set to carry with you incase of a mishap or if someone is in trouble along the road. Good stopping power.

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