Raleigh One Brakes: Keep the Front HD-T3020 Code with Its Own Field
Raleigh One brakes are not equally identified at both ends in the saved specification. The front entry names Tektro Hydraulic Disc brake HD-T3020; the rear says Tektro Hydraulic Disc brake without that model suffix. A parts enquiry should preserve this difference rather than quietly assigning the front code to the rear.
Start with the Raleigh One brakes record
The Raleigh One - Smart Bike — Sage Grey listing identifies the local One model. Keep its V25ONE10 identity beside the front and rear descriptions when discussing a particular bicycle. An abbreviated request for “One hydraulic brakes” loses the model detail that is actually supplied for the front.
Raleigh's source also allows component substitutions. A catalogue entry can guide identification, but cannot verify the delivered hardware. Retain any readable identifiers from the actual brake assembly and ask the supplier to resolve a discrepancy before selecting parts.
Why HD-T3020 and HD-T3021 are different labels
Tektro's own product page groups these two codes together, but distinguishes their levers. HD-T3020 has a three-finger blade; HD-T3021 has a four-finger blade. The shared catalogue page is not a reason to drop the final digits when communicating a replacement question.
The component catalogue describes an open, two-piston system and a post-mount caliper. Those are Tektro's product descriptions. They do not establish the rear brake's missing model code, the actual lever orientation or every part supplied on an individual Raleigh.
Read rotor thickness as thickness
The same Tektro page gives 1.8 mm under Disc and expressly calls it thickness. It is not a rotor-diameter figure. Its six-bolt TR-52 and Centerlock TR-35 entries describe catalogue options, rather than identifying which rotor is fitted to the One.
Before ordering, ask the supplier to identify the existing assembly and the applicable replacement information. This guide does not turn a catalogue option into a Raleigh approval or supply pad, fluid or installation instructions. The Raleigh collection and brand introduction provide family context while the brake question remains component-specific.
FAQ: making a precise brake enquiry
Does the rear entry explicitly say HD-T3020?
No. The saved rear-brake description omits a model suffix.
Does the 1.8 mm figure specify rotor diameter?
No. Tektro labels that value as disc thickness.
Are HD-T3020 and HD-T3021 identical lever descriptions?
No. The catalogue distinguishes three-finger and four-finger blades respectively.
Sources
- Raleigh One HIGH record (https://raleigh.co.uk/en-int/products/one-vtas1).
- Tektro HD-T3020 / HD-T3021 catalogue (https://tektro.com/en/product/257).
- Saved source records reread 6 November 2026; component substitution and model-specific limits remain applicable.
Photograph credits and permissions
Photograph 1
Original title: Raleigh Twenty
Creator: Richard Webb (Fasgadh); creator URI: https://www.geograph.org.uk/profile/196
Copyright notice: © Copyright Richard Webb.
Original source URI: https://www.geograph.org.uk/photo/7644420
License / permission: CC BY-SA 2.0
License / permission URI: https://creativecommons.org/licenses/by-sa/2.0/
Modification notice: Source-provided 640 × 640 grayscale JPEG web rendition retained byte for byte. No local crop, resize, recompression, colour changes or metadata removal. The delivered file contains JFIF metadata and no EXIF, XMP or ICC segment. Earlier source processing is unassessed; this is not claimed to be the camera original.
Source disclaimer: Historical Raleigh Twenty bicycle photographed outside Planet A Boutique, Easter Road, Edinburgh, on 3 November 2023, as identified by its source. Exact manufacturing year, condition and parts remain unverified. Related Raleigh brand context only, not a current One, Novus, Motus, Hockley or Pop model, electrical system, fit or load approval. No endorsement or warranties are implied; other rights may apply. Adaptations of the photograph remain subject to the applicable ShareAlike terms.