ROAD ENDURANCE · ALL-ROAD / MANUFACTURER CHART

Cannondale Synapse Carbon

A fast endurance road frame with StashPort storage and measured 43 mm tire clearance.

CY2025 · 195707 Rev 2 chart

Type

Road Endurance · All-road

US list price, complete bikes

$3,198.99 to $7,499.95
Read October 17, 2026

Position, size 54

Relaxed
Shorter frame reach than GnR’s fixed benchmark at this stack.

How the maker describes it

Built for long road rides, with confident handling and room for bigger tires

Cannondale places Synapse Carbon under Endurance. Its measured 43 mm frame limit meets the GnR All-road house rule; that tag does not change the manual's ASTM Condition 2 use statement or guarantee tire fit.

Classification source: Cannondale ↗. Read October 17, 2026.

Price scope and source

Synapse Carbon complete bikes from the dealer listing, from Synapse Carbon 5 (low) to Synapse Carbon 2 SmartSense (high); alloy Synapse 1 and 2 excluded. Model year: Not stated on dealer pages; the dealer lists 6 Synapse builds as 2025 and 1 as 2026 without saying which.

Both end builds opened on their dealer product pages. Model year of each build cannot be matched to the CY2025 chart. Displayed dealer prices on 2026-10-17, which are sale prices below the regular prices shown. Source is a dealer listing (Mike's Bikes), accepted by Ryan as the retail price source, not a Cannondale page. Cannondale's own US pages show no prices to our tools. Other builds of this line may price outside this range. Not an availability claim.

Manufacturer price source ↗. Reviewed October 17, 2026.

Verified tire clearance

43 mm. Manual p.8: 700c x 43 mm maximum measured frame tire width, with at least 4 mm clearance. The rigid fork limit is 48 mm. Rim, tire and fender setup still require confirmation. All-road is GnR’s ≥35 mm Road Endurance house rule, not an industry standard.

Clearance source ↗. Read October 17, 2026.

Mounts and carrying

StashPort downtube storage and top-tube accessory mount; SmartSense Gen 2 compatibility.

Exact CY2025 carbon chart from manual 195707 Rev 2 (03/26). Not the CY2022 SmartSense frame or alloy Synapse. Frame proportions exclude cockpit and saddle setup. US price not reviewed.

Published frame dimensions

Lengths are in millimeters. Head angles are in degrees. Frame stack and reach do not include the stem, spacers or handlebars.

Aggressive longer reach than the fixed benchmark at this stack · Balanced within the benchmark band · Relaxed shorter reach than the benchmark at this stack

Source: Cannondale manufacturer’s chart ↗. Checked October 17, 2026.

Where this frame sits

Each dot is one published frame size. The green band is GnR’s fixed geometry benchmark. Frames to its right have longer reach at the same stack (Aggressive); frames to its left have shorter reach (Relaxed). The benchmark does not change with bike type or catalog additions.

Comparable frames from other brands

Each is the closest match to this frame’s size 54 (stack 570 mm, reach 381 mm) among current road frames from other brands.

Prices are the maker’s US list prices for complete bikes on the date shown, and include sale prices on that date. Ranges cover only the named builds, not every bike in a family. Framesets, tax and shipping are excluded. A displayed price, including an archived sale price, does not establish stock or a purchasable offer. Retailer prices and later changes are not tracked.

Find alternatives to this frame

Use this exact chart as your reference, select your size, then explore similar dimensions or a deliberate position change. Confirm the frame generation matches your bike before using it.

Does similar geometry mean the same fit?

Similar frame dimensions are a starting point. Saddle height and setback, seat-tube geometry, stem length and angle, headset spacers, handlebars and control position affect the completed bike. Review those details before buying.