Trailboss
From £1,795.00 £1,795.00

Frame Information

Built to be a dirt, park and pump track weapon – here is our new version of Jim Davage’s signature frame from the dirt jump days of old. The Trailboss has been refined and tweaked to perfection; we have absolutely nailed the geo on this new model which comes in six different sizes from small to limo. If none of them gives you the exact reach you want we are happy to build you a custom size/reach at no extra cost. Other custom options for this frame are:

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

Technical Specifications

Specification Detail
Head tube 44mm internal diameter for tapered steerer tubes
Bottom bracket (BB) 73mm BSA threaded
Hub width 135×10mm
Seat tube size 31.6mm

Tubing Used

Tubing used for this frame is a mix of T45, Reynolds 853 and Columbus. Tube sets are chosen to match the rider.

Geometry Chart

TrailbossSMLXLXXL
S/T330330330330330
Fork100100100100100
H/T100100100100100
H/T Angle6969696969
S/T Angle72.572.572.572.572.5
Reach420430440450460
Stack546546546546546
B/B Drop-25-25-25-25-25
B/B Height310310310310310
C/S395395395395395

Trailboss

From £1,795.00 £1,795.00
Trailboss
From £1,795.00 £1,795.00

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 Trailboss

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.