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Shimano SPD vs SPD-SL vs SPD-SLR: which cleats fit which pedals
Published 24 September 2026
Disclosure: Pedal Brief may earn a commission if you buy through links on this page, at no extra cost to you. This version has no affiliate links. We have not tested these pedals or cleats ourselves. This is a summary of what Shimano states and what independent outlets have reported, with each claim credited. Full disclosures.
Who it's for: anyone buying Shimano pedals, cleats or shoes in 2026 who has seen "SPD-SLR" on a product page and wants to know whether their current cleats still fit.
Shimano now sells three clipless systems with confusingly similar names. SPD is the two-bolt system used on mountain, gravel, touring and indoor bikes. SPD-SL is the three-bolt road system Shimano has used since 2003. SPD-SLR is the new three-bolt road system launched with the Dura-Ace PD-R9300 and Ultegra PD-R8200 pedals. SPD-SLR is a real Shimano name, not a typo, and it is not interchangeable with SPD-SL.
The short version
| SPD | SPD-SL | SPD-SLR | |
|---|---|---|---|
| Bolt pattern | 2-bolt | 3-bolt | 3-bolt |
| Typical use | MTB, gravel, touring, indoor | Road | Road |
| Stock cleat | SM-SH51 (4° float) | SM-SH11 yellow (±3° float) | CL-SL110 yellow (±3° float) |
| Pedals (examples) | PD-M520, XT PD-M8100 | Previous Dura-Ace and Ultegra, current 105 | Dura-Ace PD-R9300, Ultegra PD-R8200 |
| Fits the other road system? | No | SPD-SL cleats do not fit SPD-SLR pedals | Shimano says SPD-SLR cleats are not compatible with SPD-SL pedals |
Sources for the table: Shimano product pages for the SM-SH51, SM-SH11, CL-SL110 and PD-R9300; BikeRadar and Bicycling for the compatibility rows. The 105 note is from Bicycling, which reports that 105 pedals are "not currently moving to SPD-SLR".
SPD: the two-bolt system
SPD cleats are small metal cleats that bolt to the sole with two bolts. Shimano's stock cleat, the SM-SH51, comes with "all Shimano SPD pedals", gives 4 degrees of float and has a 13-degree clip-out angle, according to Shimano. Shimano describes it as "the go-to choice for mountain bikers, indoor cyclists, and anyone looking for a durable and reliable 2-bolt cleat".
Because the cleat is small, it can sit inside the tread of a lugged mountain or gravel shoe, which is why SPD setups are the usual pick when you expect to walk. Shimano markets its XT PD-M8100 as "ideal for XC / CX racing and Gravel riding", with mud shedding as a listed feature. That is also why most gravel power-meter pedals use SPD-style cleats.
If a friend, a spin class or a gravel forum says "SPD", they almost always mean this two-bolt system.
SPD-SL: the three-bolt road system since 2003
SPD-SL cleats are larger plastic cleats that bolt on with three bolts, the standard pattern on road shoes. The bigger platform spreads load across the pedal body. The trade-off is that the cleat sticks out of the sole, so walking is clumsier than with SPD.
Shimano's stock SPD-SL cleat is the yellow SM-SH11, with "a six-degree float range (three degrees in each direction)" and a 13-degree clip-out angle, per Shimano. Red cleats are fixed and blue cleats sit in between.
Bikerumor and BikeRadar both date SPD-SL to 2003. For more than 20 years, any Shimano three-bolt road cleat fitted any Shimano road pedal. SPD-SLR ends that.
SPD-SLR: what changed
SPD-SLR keeps the three-bolt shoe pattern but changes the cleat and pedal interface. Shimano's PD-R9300 page says the system "lowers the shoe-to-pedal interface by 2.3 mm (compared to previous generation models)" and claims its "lowest stack height ever at 12.5 mm".
Other claims, as reported at launch:
- Engagement angle: 10.5 degrees, down from 15.5 degrees on SPD-SL, for quicker clip-in (Bikerumor, Cycling Weekly).
- Cleat weight: Bikerumor reports "up to 25%" lighter and gives an example of a 71 g SPD-SL cleat set against 55 g for a CL-SL120 set. That is 16 g, or about 22%, which matches the 16 g Bicycling reports and the 22% Cycling Weekly quotes. "Up to 25%" is the best case, so about a fifth lighter is a safer summary.
- Pedals: Shimano claims the Dura-Ace PD-R9300 is 11% stiffer, with 53% less rotational resistance, than the PD-R8200 (Bikerumor, Cycling Weekly). The Ultegra PD-R8200 uses the same SPD-SLR interface with a resin body instead of carbon composite (Cycling Weekly).
- Shoes: the S-PHYRE RC910 and RC810 were designed alongside the system.
Where the 2.3 mm comes from
This is the part most summaries get wrong. Bicycling reports that Shimano's headline figure is a 2.8 mm reduction compared with an RC903 shoe on a PD-R9100 pedal. The new pedal plus a red, yellow or blue SPD-SLR cleat accounts for 2.3 mm of that, and the new RC910 shoe adds the other 0.5 mm. According to Bicycling, Shimano says you still get the 2.3 mm on an older Shimano shoe or another brand's three-bolt shoe. Only the full 2.8 mm needs the new shoe.
So new shoes are not required for the 2.3 mm. The catch is cleat position.
The fore-aft catch
The low-stack cleats move most of the fore-aft adjustment into the shoe. Shimano's CL-SL110 page says "fore-aft positioning is handled at the shoe while the SPD-SLR cleat provides lateral adjustment" on its newest road shoes. BikeRadar and Bicycling both note that the low-stack cleats have almost no fore-aft range of their own.
If your current shoes cannot put the new cleat where your foot needs it, Shimano offers the grey CL-SL130. Shimano says it "provides traditional SPD-SL fore-aft positioning flexibility for non-Shimano shoes and older Shimano shoe models", with ±3 degrees of float. Bicycling and Bikerumor report that it gives no stack reduction, and Bikerumor adds that it gives no weight saving either.
The four SPD-SLR cleats
| Cleat | Colour | Float (per Shimano) | Notes |
|---|---|---|---|
| CL-SL100 | Red | Fixed, 0° | For sprinters and riders who want no float |
| CL-SL120 | Blue | 2° total (±1°) | Middle option |
| CL-SL110 | Yellow | 6° total (±3°) | Stock with SPD-SLR pedals |
| CL-SL130 | Grey | 6° total (±3°) | Traditional fore-aft range; no stack benefit per Bicycling and Bikerumor |
Float figures are from Shimano's product pages for the CL-SL100, CL-SL120, CL-SL110 and CL-SL130. Some launch coverage describes blue as "1 degree". Shimano lists it as one degree in each direction.
Compatibility, in plain terms
- SPD-SL cleats in SPD-SLR pedals: no. BikeRadar states that "SPD-SL cleats are not compatible with SPD-SLR pedals", and Bicycling says the new pedals and cleats are not backward compatible. If you buy PD-R9300 or PD-R8200 pedals, every pair of shoes you ride on that bike needs SPD-SLR cleats.
- SPD-SLR cleats in SPD-SL pedals: Shimano's cleat pages say "not compatible with SPD-SL pedals". Cycling Weekly reports that unofficially the new cleats do fit old SPD-SL pedals, but Shimano does not recommend it. Treat it as unsupported.
- SPD-SLR cleats on existing three-bolt shoes: yes, including non-Shimano shoes, subject to the fore-aft catch above (Bicycling, Shimano CL-SL130 page).
- New RC910 and RC810 shoes with older cleats: Bicycling reports that the new shoes work with any existing three-bolt cleat.
- SPD and either road system: different bolt patterns and different pedals. They do not mix.
- Is SPD-SL going away? Not yet. Cycling Weekly says SPD-SLR "does not mean the end of SPD-SL". Bicycling reports that Shimano will keep supplying SPD-SL cleats for as long as there is demand.
BikeRadar also points out what happens when systems get mixed mid-ride: Mathieu van der Poel found out in the Arenberg Forest at this year's Paris-Roubaix that SPD-SL cleats do not clip into SPD-SLR pedals. For amateurs, the more likely version is a spare bike, a turbo bike or a hire bike on the other system.
What it costs (brand-listed prices only)
Shimano's US store listed these on 24 September 2026:
| Item | Shimano US price |
|---|---|
| Dura-Ace PD-R9300 (SPD-SLR) | $300.00 |
| Ultegra PD-R8200 (SPD-SLR) | $200.00 |
| SPD-SLR cleats (CL-SL100, 110, 120, 130) | $35.00 each listing |
| SM-SH11 SPD-SL cleats | $34.00 |
| SM-SH51 SPD cleats | $21.00 |
Cycling Weekly reports UK/EU prices of £199.99 / €229.99 for Dura-Ace, £139.99 / €160.99 for Ultegra and £24.99 / €28.99 a pair for cleats. We have not checked those against Shimano's UK or EU stores. Prices change, so check before you buy.
Who should switch
- Due new road pedals anyway, one bike: SPD-SLR is the current Dura-Ace and Ultegra option. Budget for SPD-SLR cleats on every pair of shoes you use.
- Several bikes on SPD-SL: switching one bike means keeping two cleat types or converting everything. For most people that hassle outweighs 2.3 mm.
- Happy with SPD-SL: nothing forces a change. Shimano still sells SPD-SL cleats, and 105 pedals remain SPD-SL for now.
- Gravel, MTB, commuting or indoor on two-bolt cleats: none of this applies to you. SPD is unchanged.
What we could not confirm
- Shimano's own compatibility statement for SPD-SL cleats in SPD-SLR pedals. We found it stated by BikeRadar and Bicycling, but Shimano's pedal page does not spell it out in the text we read.
- Whether 2.3 mm of stack makes a measurable difference for an individual rider. Cycling Weekly repeats a claim of about 1% more power per millimetre, but that is a report, not a result we can source to a study.
- Which cleat pairing gives Shimano's "up to 25%" weight figure. The one example we found works out to about 22%.
- UK and EU prices from Shimano directly.
- When, or whether, 105 pedals move to SPD-SLR.
Sources
- Shimano product pages: PD-R9300, PD-R8200, CL-SL100, CL-SL110, CL-SL120, CL-SL130, SM-SH11, SM-SH51, PD-M8100, PD-M520. Checked 24 September 2026.
- Bicycling: Is breaking 23 years of pedal compatibility worth 2.8 mm of lower stack?
- BikeRadar: Shimano SPD-SLR review
- Bikerumor: new Shimano SPD-SLR pedals, shoes and cleats
- Cycling Weekly: Shimano introduces SPD-SLR