Review: 45NRTH Heiruspecs Flat Pedals

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Heiruspecs is an unusual name for a flat pedal, as it seems to be entirely derived from a Minnesota hip hop band. What these pedals have to do with hip hop, I don’t know, but 45NRTH do also come from the same US state, and they get plenty of snow there, which these pedals are specifically designed for.

45nrth Heiruspecs
The bodies were designed and tested in a snowy climate, which we don’t often have here in the UK, but they’re equally good at shedding mud.

Bearing that in mind, I gave the pedals a little credit despite their being equipped with my least favourite pin type – squat little hex studs. Combined with slight concavity though, I didn’t find them too lacking in grip; I just had to keep thinking about what the pedals were designed for.

It’s worth stressing that 45NRTH bill these pedals as “fat bike specific”, and indeed their website is filled with pictures of smiling fatbikers playing in the snow. We didn’t exactly have the bikes or conditions to test the Heiruspecs like that here, but we did have Britain’s one plentiful resource: Mud! As advertised, the generous cutouts in the Heiruspecs bodies do clear it well.

45nrth Heiruspecs
At 352 grams, they’re pretty lightweight compared to most flats.

The bodies of the Heiruspecs are CNCed down to a collection of quite slender struts, creating massive cutouts both vertically and horizontally through the pedal. The weight of these alloy bodies on Cr-Mo axles is just 352 grams. While we didn’t have any dings big enough to bend bits of them during our test, it’s worth bearing this in mind – these are not really designed for high stress applications like freeride, dirtjumping or downhill, but more for cranking out mile after mile in adverse weather.

45nrth Heiruspecs
The very large cutouts in the body leave fewer surfaces to hold onto mud or snow.

Not that I do anything like freeride, but I did take them down something with a lot of loose rocks and 2 – 3 foot drops, and as I kind of expected, ended up occasionally losing them, hitting my bum on my seat then balance biking short sections. After that ride, I decided to just use them for conditions and the kind of riding they were more suited to. With that kind of discipline, they gave me no trouble at all.

45nrth Heiruspecs
They’re not the thinnest pedals on test, at 18mm, but that’s not a primary worry when you’re riding in heavily insulated winter boots.

The pin layout is deliberately non-agressive to work with the kind of soft rubber, flat soled boots people are more likely to wear for cold weather riding and racing. The body thickness varies from 17.5mm at the edges to 18.5mm over the axle, with any concavity provided by the pin heights. There are no centre pins, just pins at the edge, and the drop from the top of the pins to the top of the axle bulge is 3.8mm. That doesn’t sound like a lot, but for the sole of a shoe to sag into, it’s quite a bit.

45nrth Heiruspecs
With stubby pins, these aren’t the grippiest pedals, but they don’t need to be – they’re not really aimed at downhillers or freeriders; they’re billed as fatbike specific, and are more of a winter-XC pedal.

Platforms are roughly 100mm by 100mm, so not the biggest on test, but probably comfortable a few sizes either side of the average UK men’s shoe size (9). Most pins are on the outer edge of the pedal, and between the crank end ones and the middle pins there’s quite a large gap, so unfortunately if you have smaller feet you might find not all of the pins fit under them and a smaller or more plentifully pinned pedal might suit you better.

Overall: The Heiruspecs are definitely a little niche, and 45NTRH make no pretense otherwise. If you do a lot of miles in mud or snow, these are great at clearing it.

Review Info

Brand: 45NTRH
Product: Heiruspecs flat pedals
From: Charlie The Bikemonger
Price: £99.99
Tested: by David Hayward for Two months

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David started mountain biking in the 90’s, by which he means “Ineptly jumping a Saracen Kili Racer off anything available in a nearby industrial estate”. After growing up and living in some extremely flat places, David moved to Yorkshire specifically for the mountain biking. This felt like a horrible mistake at first, because the hills are so steep, but you get used to them pretty quickly. Previously, David trifled with road and BMX, but mountain bikes always won. He’s most at peace battering down a rough trail, quietly fixing everything that does to a bike, or trying to figure out if that one click of compression damping has made things marginally better or worse. The inept jumping continues to this day.

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