Shimano R451 57mm Drop Brake Caliper

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Top Features:

  • Must be used in conjunction with ST-4600, ST-4603, ST-5700, ST-5703, ST-6700 or ST-7900 STI's
  • 57mm drop (47-57mm pad height adjustment)
  • Lightweight aluminium calliper design with tough anodised finish
  • Toe-in adjustable brake shoes for perfect pad alignment
  • Durable quick release for fast and easy wheel removal
  • Comes with 10.5/12.5/18 and 27mm sunken nut

Product Data

  • Brake Type: V-Brake
  • Commuter: Yes
  • Touring: Yes
  • Cyclocross: Yes
  • Time Trial: Yes
  • Road: Yes

Description

The super SLR dual pivot design keeps operating friction to a minimum, improving braking performance. The 57mm drop is measured from the central mounting bolt to a virtual point between the pads, which aligns with the centre of the pad at its lowest point.

Returns

We will happily refund any item purchased on Wiggle if returned to us within 365 days; excluding Wiggle gift vouchers, nutrition and customised products, except when faulty.

Please note: Bikes and other bulky items cannot be returned using our local returns service (where applicable). Please contact us and we can arrange to collect these from you using our discounted courier rates. There is a fee for all collections, except for faulty products.

Returned goods must be unused and supplied with their original packaging, unless the goods are faulty. Wiggle will pay the return postage costs for any faulty items.
More information on Wiggle's return policy

Customer Reviews

Shimano R451 57mm Drop Brake Caliper is rated 4.6 out of 5 by 24.
Rated 4 out of 5 by from Winter bike Bought these to fit on my winter bike that requires additional clearance due to mudguards. They are slightly heavier than road ultegra brakes. I changed the brake blocks to some better quality ones I had and compared to the SRAM red brakes I took off (due to being a bit short) the Shimano brakes (with the same brake blocks) work far more effective. So overall I am well impressed with these brakes, in terms of quality and at an amazing price.
Date published: 2019-12-19
Rated 5 out of 5 by from tyre clearence and fok copatability needed this for a build as standard 105s bolts not long enough for a kinisis titanium gf frame, this sorted the problem , despite not matching new 105 groupset they still look ok with the ti frame.
Date published: 2019-10-22
Rated 5 out of 5 by from Good balance of value uper value, these are not in the league of the more expensive options but they are 10 times better than the own brand calipers that came on my Synapse. The cheapest and best upgrade i've made. Very happy
Date published: 2019-02-13
Rated 5 out of 5 by from Great brake if it fits, but be careful with sizing I bought this for my early 80s fixed gear conversion. This brake would be considered "long" compared to most of the standard options (e.g. Ultegra), so make sure your frame/forks require it. (I measured the distance from brake bolt to rim, and so I knew the reach would be right) The only other issue I encountered while fitting it is that the bolt wasn't long enough to go all the way through my vintage fork (like the old brake did), and the hole was too small to accommodate the recessed hex nut. So I had to fudge it a bit, and the brake is only attached on the front side of the fork. I've heard of other people drilling vintage forks to accommodate the larger (recessed) nut for this reason, but my solution works well enough and I didn't want to hurt my precious! Also worth noting that the brake came with 3 or 4 different options, so you can choose the nut length that suits your bike best (I chose the one that fit inside my fork!). Even with my slightly 'creative' installation, it won't budge and feels very sturdy. The braking action is immediate, and thanks to the clever little centring screw, it's possible to set the pads/shoes very close to the rim when disengaged, but without dragging on the wheel at all — an absolute dream compared to my old brake, which would either take half the lever action just to touch the rims, or drag on the wheel the whole way home! Overall I'm very satisfied with this brake. It didn't cost the earth, the action is perfectly symmetrical, and it's been easy to adjust as the cable stretches out. I'm particularly a fan of the centring screw, which means you can adjust the left/right pad position without moving the centre bolt — everything feels much more precise as a result, and I feel more confident riding fast through London. Another quality product from Shimano! NB, doesn't come with a cable, lever, or barrel adjuster
Date published: 2017-04-27
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Q & A

Are these compatible with ST-2300 brake levers?

Asked by: LJ80
I can confirm that these will be compatible with your brake levers. I hope this helps.
Answered by: wigglegrant
Date published: 2016-09-17

Compatible with Sora Levers

Hi, I've got a Cannonade Synapse 2013, would these be compatible with the Sora levers? Cheers
Asked by: Tristian
Yes, these will be compatible.
Answered by: WiggleDanO
Date published: 2014-07-11

Would these be compatible with Sram Force 22 / Red 22?

Asked by: BAMC123
These are only compatible with shimano ST-4600, ST-4603, ST-5700, ST-5703, ST-6700 or ST-7900 STI's for correct leverage ratio
Answered by: WiggleBarney
Date published: 2015-06-20

Can these be fitted on a Giant TCX 3 2012 model?

Looking to replace the cantilevers on my TCX 3 that I use as a commuter - have 23mm tyres on at the moment and switch to 28mm if going off-road/tow paths. Would these be a suitable replacement?
Asked by: Johannsenn
I can confirm that these calipers will not fit your bike. Please contact sales@wiggle.co.uk for further assistance on this question.
Answered by: WiggleAlex
Date published: 2013-10-23

Will these work with Shimano Claris 2400 8 Speed STI Levers?

Asked by: Timmaahh
These will work with those levers.
Answered by: WigglePaul
Date published: 2014-09-15

Clearance for mudguards

Are these wide enough at the top to fit 45mm mudguards?
Asked by: Duggy83
These would be suitable.
Answered by: WiggleKingL
Date published: 2019-10-14

Do these brakes come with pads?

Asked by: 33duke33
I can confirm that the callipers are provided with brake pads and shoes. I hope this helps.
Answered by: wigglegrant
Date published: 2013-10-23

Will these fit Cannondale Synapse 6 Tiagra 2014?

Asked by: thewrayster
These should be compatible with your bicycle.
Answered by: WiggleKris
Date published: 2014-11-14

Will these brake calipers work with shimano slr brake levers?

Will these brake calipers work with shimano slr brake levers, also can you please recommend brake cables (front and rear) which will fit the brake levers. Thank you
Asked by: CPAI
On the above question... the SLR levers do seem fairly "standard"... the exact brake lever model are Shimano BL-1051, SLR 105 brake levers.
Answered by: CPAI
Date published: 2015-07-12

I have just bought a set of br-r451 caliper brakes why are there no radiised washes with them?

Asked by: lisp
I can confirm that these will be supplied with all of the washers required for these brakes to be installed.
Answered by: WiggleShack
Date published: 2014-10-12
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