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A rider picking a line down a rock staircase on the loop

Every frame rides the Cinderback Loop before it ships.

TIG-welded steel gravel and mountain frames from a two-person shop in Cutbank. 14.2 km, 360 m of climbing and one rock garden. If a frame comes back with a problem, it goes back on the bench, not in a box.

Frame and steel fork, from
$2,600
Complete build, from
$5,200
From deposit to your door
12 weeks

The test loop

14.2 km out the back gate, five places to break a frame

We built the Cinderback Loop out of the worst bits of the Scarcroft Hills: a braking zone, a steep climb, a rock garden and a long fast descent. Pick a checkpoint to see what it tests and how the last frame did.

14.2 km, 360 m of climbing, highest point 604 m. Sample results.

Elevation profile of the Cinderback Loop with five checkpoints: Quarry Drop, The Grind, Boneyard, Long Shot and Last Gate400 m500 m600 m0 km2 km4 km6 km8 km10 km12 km14 km

Checkpoint 3 of 5, at 7.9 km

Boneyard: rock gardens

300 m of limestone ledges with square edges up to 30 cm, dry or greasy depending on the week.

What it tests. Tyre clearance with mud packed in, chainslap on the stays, and the head tube junction, which takes the hits first.

Scree gravel, last test lap

6mm each side, wet

45 mm tyres through the ledges on the wet lap. Clearance left with the mud still packed in:

Two frames. We would rather make two well than ten.

Both are built to your measurements, both come with a steel fork or a suspension fork of your choice, and both do the full loop before paint.

Scree

Gravel

For the rider whose gravel ride keeps turning into singletrack. Long enough to be calm at 55 km/h on a fire road, short enough at the back to climb loose rock.

Tyres
700 x 50 mm or 650b x 2.1 in
Tubing
Air-hardening steel, 0.9 / 0.6 / 0.9 mm down tube
Axles
12 mm thru, flat-mount discs
Mounts
Three bottles, top tube bag, rack and fenders
Weight
About 2.1 kg for a 56 cm frame

Frame and fork from

$2,600

Complete bike from

$5,200

Spall

Mountain hardtail

A 29er hardtail for rock, roots and the kind of descent you walk the first time. Built around a 130 mm fork and a steel rear end that takes the edge off without folding.

Tyres
29 x 2.5 in with room for mud
Fork
120 to 140 mm, 64.5 degree head angle at 130
Rear
Boost 148, post-mount 180 mm, 73 mm threaded shell
Routing
Internal dropper, external brake and gear lines
Weight
About 2.6 kg for a large frame

Frame and fork from

$2,900

Complete bike from

$5,600

A builder TIG welding a tube in the dark workshop
Sparks off the grinder in the unlit back of the shop
Mud packed around a rear cassette and dropout

41 welds, one pair of hands, no second shift

Abel welded pipeline and race car roll cages for 26 years before he built his first frame. He still welds every one, at one bench, and stops at two frames a week.

  1. 01Mitred by hand to a tenth of a millimetre

    Every tube is cut on a manual mill and filed to fit. A tight mitre means the weld fills a gap you can barely see, not a gap it has to bridge.

  2. 02Eight tacks before the first bead

    The fixture is set to your drawing, not a size chart. We tack the front triangle, check it, then tack the rear end and check again.

  3. 03TIG welded with argon inside the tubes

    Back-purging keeps the inside of each joint as clean as the outside. 41 welds on a Scree, all by the same hands, none by a robot.

  4. 04Cold set, then dye-checked twice

    Aligned on the table after welding and dye-penetrant tested before the loop. After the loop, it happens again. That second check is the one that matters.

Photographed before we hose them off

Every frame is shot straight off the loop, in bare steel, with whatever the Scarcroft Hills left on it. Clean photos come later, after paint.

A mud-caked frame and fork after a wet lap
#0338 Spall, large. After the wet lap in March, 8 mm of clearance still showing.
A hardtail dropping into a steep forest section
#0335 Spall, medium. The beech woods below Long Shot.
A gravel frame on a loose, rocky double track
#0341 Scree, 56 cm. 50 mm tyres on the quarry road.

Twelve weeks, and you see every one of them

We take two frames a week and no more, so the date we give you on the fit call is the date the box leaves the yard.

  1. Week 1

    Fit call and deposit

    An hour on the phone or at the shop. Your measurements, the numbers off your current bike, and the riding you actually do. $800 holds your bench slot and comes off the final price.

  2. Weeks 2 to 3

    A drawing to sign off

    Ione draws the geometry and sends it with a note on how it will ride. You approve a drawing, not a size.

  3. Weeks 4 to 7

    Your frame on the bench

    Mitre, tack, weld, align. You get photos at each stage, including the ugly ones.

  4. Week 8

    The Cinderback Loop

    Two laps, one dry and one wet if the weather obliges, then the bench check. You get the checkpoint results and the muddy photos.

  5. Weeks 9 to 10

    Paint

    Powder coat or wet paint from the booth across the yard. No decals unless you ask for them.

  6. Weeks 11 to 12

    Build, one more lap, ship

    Complete bikes are built here and ridden once more as a whole bike. Then boxed and shipped, or collected from the yard.

The two of us pushing up the steepest pitch of the loop

Abel welds. Ione rides. Both of them push up The Grind.

Abel Makepeace

Welder since 1988: pipeline, then roll cages for a hill-climb team. Built his first frame in the shed in 2014 because he could not find a hardtail that survived the Boneyard. He mapped the loop the same winter.

Ione Szabo

Six seasons of enduro racing and a mechanical engineering degree. She draws every geometry, rides every test lap and writes up the results you get in week 8.

340 frames since 2014. Three have come back with a crack, all three were rebuilt free, and all three failures changed how we weld (sample figures).

Riders who asked for proof, and got it

I asked if they really ride every frame. Ione sent me a clip of mine going through the Boneyard, still in bare steel. Four seasons on, it has never made a noise.
Cato R., Scree, 58 cm. Sample review.
I cracked two carbon hardtails on the same rocky ridge at home. The Spall has done three seasons on that ridge and the only thing I have replaced is tyres.
Ivo M., Spall, large. Sample review.
They told me my first geometry idea would get nervous above 50 km/h, drew a second one and explained why. They were right. Twelve weeks, almost to the day.
Birgit K., Scree, 50 cm. Sample review.

Next bench slots

Two slots left in January

Tell us what you ride and where. Ione replies within two working days with a rough price, a slot date and a time for the fit call. Nothing is booked until you pay the $800 deposit.

(555) 014-3131

Unit 4, 88 Coke Oven Row, Cutbank. Visits by appointment, Tuesday to Saturday. Bring your current bike.

Slot counts are sample values.