MODEL AND SIZING GUIDE
Giant Roam size guide
A source-linked guide for riders comparing Roam models for everyday and mixed-surface riding.
Guide updated 2026-09-22 · Source-check dates belong to individual entries. Independent editorial review pending.
Match the exact model and its published chart before choosing a size. If two size bands overlap, keep both as candidates. The year can stay unknown until you identify the generation.
Which Giant Roam do you have?
Retain Roam, Disc and the full model number. Match the fork and frame details to the dated source; a replacement fork does not establish a different model year.
Collect a full side photo, the model wording, frame-size sticker, wheel marking and a view of the brakes and fork. Open the original listing for the candidate entry and compare the specification and any photographs it provides. Changed components or matching paint alone cannot prove the generation.
Follow the guide to identifying an unknown model year. Leave the chart unconfirmed until the frame generation and wheel option match.
What is recorded for this model family?
40 catalogue entries: 28 with body ranges and 12 with size labels only. Documented model or catalogue years: 2024, 2023, 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015. These are source records, not a count of distinct frame generations or bikes currently in stock.
A source-check date is not a manufacturing date. Two sources can describe the same bike, and a retailer may list only some of its original sizes. Missing years or dimensions are left unknown.
Your selected entry
The details below belong only to the selected entry.
Giant Roam 1 Disc — 2020
Model 2020 · Source checked 2026-09-20 · Manufacturer · Australia
Exact Australian archive model-year page. Height ranges do not confirm inside-leg clearance. Check the wheel option and components on the actual bike; current models are not substituted for older versions.
| Frame size | Rider height | Inside leg |
|---|---|---|
| S | 160–170 | Not published |
| M | 170–180 | Not published |
| L | 180–190 | Not published |
| XL | 190–200 | Not published |
Browse all Giant Roam variants and years
Choose an entry to see its recorded sizing information above. Each selection stays within this model-family guide.
| Exact model and source date | Recorded year | Available evidence | Open record |
|---|---|---|---|
| Giant Roam Disc 1 — 2024Manufacturer · checked 2026-09-20 | Model 2024 | Body rangesS / M / L / XL | View chart for Giant Roam Disc 1 — 2024 |
| Giant Roam Disc 2 — 2024Manufacturer · checked 2026-09-20 | Model 2024 | Body rangesS / M / L / XL | View chart for Giant Roam Disc 2 — 2024 |
| Giant Roam Disc 1 — 2023Manufacturer · checked 2026-09-20 | Model 2023 | Body rangesS / M / L / XL | View chart for Giant Roam Disc 1 — 2023 |
| Giant Roam Disc 4 — 2023Manufacturer · checked 2026-09-20 | Model 2023 | Body rangesS / M / L / XL | View chart for Giant Roam Disc 4 — 2023 |
| Giant Roam Disc 0 — 2022Manufacturer · checked 2026-09-20 | Model 2022 | Body rangesS / M / L / XL | View chart for Giant Roam Disc 0 — 2022 |
| Giant Roam Disc 1 — 2022Manufacturer · checked 2026-09-20 | Model 2022 | Body rangesS / M / L / XL | View chart for Giant Roam Disc 1 — 2022 |
| Giant Roam Disc 2 — 2022Manufacturer · checked 2026-09-20 | Model 2022 | Body rangesS / M / L / XL | View chart for Giant Roam Disc 2 — 2022 |
| Giant Roam Disc 3 — 2022Manufacturer · checked 2026-09-20 | Model 2022 | Body rangesS / M / L / XL | View chart for Giant Roam Disc 3 — 2022 |
| Giant Roam Disc 4 — 2022Manufacturer · checked 2026-09-20 | Model 2022 | Body rangesS / M / L / XL | View chart for Giant Roam Disc 4 — 2022 |
| Giant Roam 0 Disc — 2021Manufacturer · checked 2026-09-20 | Model 2021 | Body rangesS / M / L / XL | View chart for Giant Roam 0 Disc — 2021 |
| Giant Roam 1 Disc — 2021Manufacturer · checked 2026-09-20 | Model 2021 | Body rangesS / M / L / XL | View chart for Giant Roam 1 Disc — 2021 |
| Giant Roam 2 Disc — 2021Manufacturer · checked 2026-09-20 | Model 2021 | Body rangesS / M / L / XL | View chart for Giant Roam 2 Disc — 2021 |
| Giant Roam 3 Disc — 2021Manufacturer · checked 2026-09-20 | Model 2021 | Body rangesS / M / L / XL | View chart for Giant Roam 3 Disc — 2021 |
| Giant Roam 4 Disc — 2021Manufacturer · checked 2026-09-20 | Model 2021 | Body rangesS / M / L / XL | View chart for Giant Roam 4 Disc — 2021 |
| Giant Roam 0 Disc — 2020Manufacturer · checked 2026-09-20 | Model 2020 | Body rangesS / M / L / XL | View chart for Giant Roam 0 Disc — 2020 |
| Giant Roam 1 Disc — 2020Manufacturer · checked 2026-09-20 | Model 2020 | Body rangesS / M / L / XL | View chart for Giant Roam 1 Disc — 2020 |
| Giant Roam 2 Disc — 2020Manufacturer · checked 2026-09-20 | Model 2020 | Body rangesS / M / L / XL | View chart for Giant Roam 2 Disc — 2020 |
| Giant Roam 3 Disc — 2020Manufacturer · checked 2026-09-20 | Model 2020 | Body rangesS / M / L / XL | View chart for Giant Roam 3 Disc — 2020 |
| Giant Roam 4 Disc — 2020Manufacturer · checked 2026-09-20 | Model 2020 | Body rangesS / M / L / XL | View chart for Giant Roam 4 Disc — 2020 |
| Giant Roam 0 Disc — 2019Manufacturer · checked 2026-09-20 | Model 2019 | Body rangesS / M / L / XL | View chart for Giant Roam 0 Disc — 2019 |
| Giant Roam 1 Disc — 2019Manufacturer · checked 2026-09-20 | Model 2019 | Body rangesS / M / L / XL | View chart for Giant Roam 1 Disc — 2019 |
| Giant Roam 2 Disc — 2019Manufacturer · checked 2026-09-20 | Model 2019 | Body rangesS / M / L / XL | View chart for Giant Roam 2 Disc — 2019 |
| Giant Roam 3 — 2019Manufacturer · checked 2026-09-20 | Model 2019 | Body rangesS / M / L / XL | View chart for Giant Roam 3 — 2019 |
| Giant Roam 0 Disc — 2018Manufacturer · checked 2026-09-20 | Model 2018 | Body rangesS / M / L / XL | View chart for Giant Roam 0 Disc — 2018 |
| Giant Roam 1 Disc — 2018Manufacturer · checked 2026-09-20 | Model 2018 | Body rangesS / M / L / XL | View chart for Giant Roam 1 Disc — 2018 |
| Giant Roam 2 Disc — 2018Manufacturer · checked 2026-09-20 | Model 2018 | Body rangesS / M / L / XL | View chart for Giant Roam 2 Disc — 2018 |
| Giant Roam 3 — 2018Manufacturer · checked 2026-09-20 | Model 2018 | Body rangesS / M / L / XL | View chart for Giant Roam 3 — 2018 |
| Giant Roam 3 — 2017Manufacturer · checked 2026-09-20 | Model 2017 | Body rangesS / M / L / XL | View chart for Giant Roam 3 — 2017 |
| Giant Roam 0 Disc — 2017Manufacturer · checked 2026-09-20 | Model 2017 | Size labels onlyS / M / L / XL | View size labels for Giant Roam 0 Disc — 2017 |
| Giant Roam 1 Disc — 2017Manufacturer · checked 2026-09-20 | Model 2017 | Size labels onlyS / M / L / XL | View size labels for Giant Roam 1 Disc — 2017 |
| Giant Roam 2 Disc — 2017Manufacturer · checked 2026-09-20 | Model 2017 | Size labels onlyS / M / L / XL | View size labels for Giant Roam 2 Disc — 2017 |
| Giant Roam 0 Disc — 2016Manufacturer · checked 2026-09-20 | Model 2016 | Size labels onlyS / M / L / XL | View size labels for Giant Roam 0 Disc — 2016 |
| Giant Roam 1 Disc — 2016Manufacturer · checked 2026-09-20 | Model 2016 | Size labels onlyS / M / L / XL | View size labels for Giant Roam 1 Disc — 2016 |
| Giant Roam 2 Disc — 2016Manufacturer · checked 2026-09-20 | Model 2016 | Size labels onlyS / M / L / XL | View size labels for Giant Roam 2 Disc — 2016 |
| Giant Roam 3 — 2016Manufacturer · checked 2026-09-20 | Model 2016 | Size labels onlyS / M / L / XL | View size labels for Giant Roam 3 — 2016 |
| Giant Roam 0 Disc — 2015Manufacturer · checked 2026-09-20 | Model 2015 | Size labels onlyS / M / L / XL | View size labels for Giant Roam 0 Disc — 2015 |
| Giant Roam 2 Disc — 2015Manufacturer · checked 2026-09-20 | Model 2015 | Size labels onlyS / M / L / XL | View size labels for Giant Roam 2 Disc — 2015 |
| Giant Roam 3 — 2015Manufacturer · checked 2026-09-20 | Model 2015 | Size labels onlyS / M / L / XL | View size labels for Giant Roam 3 — 2015 |
| Giant Roam XR 0 — 2015Manufacturer · checked 2026-09-20 | Model 2015 | Size labels onlyS / M / L / XL | View size labels for Giant Roam XR 0 — 2015 |
| Giant Roam XR 1 — 2015Manufacturer · checked 2026-09-20 | Model 2015 | Size labels onlyS / M / L / XL | View size labels for Giant Roam XR 1 — 2015 |
How to choose between sizes
Record the fork setup used for any measurement or recording. Check the bike’s adjustment limits and normal control access before transferring a position from a different bike.
Measure height and inside leg twice, barefoot. Where both are published, keep each height and inside-leg pair together. Keep all overlapping candidates. If the measurements conflict, sit outside the chart or rely on an open-ended band, seek individual advice rather than extrapolating.
Read the guide to choosing between two bike sizes. Frame stack and reach do not include the whole hand or forearm-pad position, and a height chart cannot establish handling or comfort.
Buying this bike second hand?
Ask which parts have changed, confirm the physical frame label and check the actual component limits. A receipt date may differ from the model year. Photographs help identify the bike; they cannot replace a mechanical inspection.
Use the second-hand bike sizing checklist before travelling to see a listing.
Other model families to compare
These are separate bikes to investigate, not equivalent sizes or a ranked buying recommendation. Match each candidate to its own chart.