XR
From £2,495.00 £2,495.00

Frame Information

The Curtis XR is an absolute enduro, trail, and all-mountain weapon.

Designed as a 150mm travel single-pivot dirt bike, its 64-degree head tube and 77-degree seat tube angles provide a geometry that allows you to climb with ease, rail corners, and go downhill incredibly fast.

The material we chose for the frame is Reynolds 853, and the swingarm is T45 Aerospace grade steel, a tube set we know, love and trust from decades of national title-winning bikes.

The reasons a Curtis feels different.

Since 1972, we've built steel frames recognised among the finest in England.

Fillet Brazing

Brian Curtis' signature brazing technique creates beautiful rippled joints and airtight tubes, protecting Curtis frames from internal rust.

Discover fillet brazing

Made To Order

Every frame is made to order in Somerset, this is what makes a Curtis special. In the configurator, change every part of your new frame.

See how we build each frame

Premium Steel

Reynolds, Columbus, Dedacciai, and T45 are cherry picked frame by frame for an unmatched strength-to-weight ratio, and ride feel.

Explore our premium steel

Model Differences

The XR platform is split into two models based on wheel size. The XR650 (155mm travel) runs 27.5" wheels and is renowned for its corner-railing agility. The XR29 (150mm) utilizes 29" wheels to cover rough ground effortlessly with unshakeable stability.

Latest Review

Brian Curtis has been making frames for nearly 50 years and, together with Gary Woodhouse, he’s built a reputation for beautiful yet robust brazed steel bikes. The XR650’s outwardly simple yet sorted single-pivot frame combines a tautly-sprung ride feel with stunning looks.

Guy Kesteven-Bike Radar

Technical Specifications

Specification Detail
Shock Length 230 x 60mm (150/155mm travel)
Seat tube 31.6mm
Head tube Tapered compatibility (Top: ZS44/28.6 | Bottom: EC44/40)
Bottom bracket 73mm BSA threaded
Frame Weight 7.23 lbs / 3.86kg (18" frame without shock)
Complete Bike Weight 32.04 lbs / 14.53kg
Chain Guide Includes ISCG mounts as standard

Tubing Used

Tubing Material
Swingarm (seatstays, chainstays) T45, 3 different weight options depending on riding intensity
Downtube T45
Top tube Reynolds 853
Seat tube Reynolds 631

Geometry Chart

XR650XSSMLXLXXL
S/T151617181920
FORK170170170170170170
H/T100100110110120130
H/T ANGLE646464646464
S/T ANGLE767676767676
REACH440450465480495515
STACK579579588588597606
B/B DROP-14-14-14-14-14-14
B/B HEIGHT340340340340340340
C/S435435435435435435
XR29XSSMLXLXXL
S/T151617181920
Fork160160160160160160
H/T100100110110120130
H/T Angle646464646464
S/T Angle777777777777
Reach440450465480495515
Stack604604613613622631
B/B Drop-28-28-28-28-28-28
B/B Height340340340340340340
C/S449449449449449449

XR

From £2,495.00 £2,495.00
XR
From £2,495.00 £2,495.00

Important Information

Warranty

All Curtis frames come with a six year warranty to the original owner and are not transferable. This warranty is limited to the repair and replacement of frame only.

What this warranty covers
  1. Frame failure due to a manufacturing error of any sort.
  2. Frame failure due to a material defect in any part of the frame.
  3. Frame failure due to internal rusting, this does not include the
    seat tube which up to the owner too keep free from water and rust.
What this warranty does not cover
  1. Normal wear and tear to paint.
  2. Damage to frame due to improper maintenance/assembly such as a cross-threaded bottom bracket shell.
  3. Damage due to crash impact such as flared head tube or cracked dented tubing.
  4. Rust on the exterior of the frame or inside the seat tube.
Crash damage

Your frame will be inspected and if we think its repairable we will repair it free of charge. Re-painting, if required, is at the customer’s expense.

Smoked clear coat disclaimer Return to XR

The smoked clear coat is our most popular finish, chosen by around 75% of our customers, because it shows off the workmanship that has gone into the frame with the brazing being so visible. The smoked clear coat finish, as with our other paint finishes, is a polyurethane based powder coat paint which is strong as hell, offering excellent chip resistance.

The upside to this finish
  1. It looks stunning in all its naked glory.
  2. It shows off the craftsmanship and brazing.
  3. It looks like nothing else out there.
The downside to this finish
  1. It is possible for ‘creeper rust’ to form beneath the surface of the smoked clear coat.
  2. ‘Creeper rust’ beneath the surface of the smoked clear coat is not covered by the Curtis Bikes warranty.
  3. ‘It is possible for ‘creeper rust’ to progress and become ‘bad rust’. This is also not covered by the Curtis Bikes warranty.
  4. Be warned you will have to get used to lots of people asking lots of
    questions about the frame like what is the gold welding, where/how are
    they made etc.
What is creeper rust?

Creeper rust is a non-penetrating type of surface rust that can form in between the surface of the frame and the paint. It can occur on all painted steel frames however will only be visible with a clear coat finish. Creeper rust doesn’t need the paint to be chipped or scratched
in order to form, it just starts randomly under the surface of the paint. This can occur within 6 months or many years.

How the frame is stored and looked after will make a big difference to how creeper rust forms and develops, so we recommend storing your frame in dry and warm conditions rather than cold or damp conditions.

Does creeper surface rust damage the frame?

Creeper rust itself does not have any impact on the structural
integrity of the frame. It does not damage the frame at all; it is
purely a surface rust that creeps beneath the paint and can be removed
when the frame is stripped, leaving no marks on the tubing at all. However,
creeper rust can sometimes develop into ‘bad rust’, which can result in
pitting and structural damage to the frame, so it is vital that
customers keep an eye on any creeper rust and send photos to us so that
we can assist accordingly.

Preventing creeper rust progression

In cold or damp conditions it is possible for creeper rust to develop
into ‘bad rust’. Creeper rust becomes bad rust if it forms in one
condensed area. Eventually bad rust will start to lift paint from the
surface of the frame. This will pit the tubing, causing irreversible
damage to the surface; leaving pitting marks where the rust has started
eating into the tubing. It is not possible to polish pitting out.
Therefore, if you start to see creeper rust forming in concentrated
areas, it is definitely time to strip and re-paint your frame before any
damage to the tubing is done.

To summarise

We are more than happy offer our customers hand polished and smoked
clear coated frames however customers who wish to order one must read
and understand the information above. Curtis Bikes cannot accept
responsibility for creeper rust that is allowed to progress into bad
rust. Creeper rust removal and re-coating are not covered by the Curtis
Bikes warranty.

The customer is responsible for:

  1. looking after their frame and keeping an eye on any creeper rust that may appear;
  2. contacting us as soon as any areas of creeper rust begin to collect
    in a condensed area, returning the frame to us for re-coating at the
    customer’s expense before any damage is done to the tubing;
  3. ensuring that any chips or scratches to paint are treated to prevent rust from starting.
Repaint service

A Curtis frame is designed to live for a long long time and
with a little TLC it will pretty much last for ever, which is why we
offer a strip and re-paint service. This includes striping the original
paint, prepping and re-painting in a colour of your choice, finished off
with new decals and metal head tube badge.

Gravel & Hardtail:

Standard colour £250

Candy red or blue and smoked clear coat £300

Full Suspension:

Standard colour £300

Candy red or blue and smoked clear coat £350

Comes with new Enduro Max bearings.

Before you send your frame back for a re-paint, please remove all
decals and completely strip it down of all components, if you can’t
remove your headset cups, we’re happy to remove and re-fit them for you.