diff --git a/src/apps/opportunities/README.md b/src/apps/opportunities/README.md
index 4b25c7221..e04f02be2 100644
--- a/src/apps/opportunities/README.md
+++ b/src/apps/opportunities/README.md
@@ -695,8 +695,11 @@ challenge track, while authored external-URL rows omit that file action. The
 browser requests a short-lived URL from
 `GET /v6/submissions/:submissionId/download-url` instead of using submission
 list URLs; Review API remains authoritative for access and signs only clean
-storage, so pending DMZ and quarantined files cannot be downloaded. Work
-Manager's case-insensitive `submission_type=url` challenge
+storage, so pending DMZ and quarantined files cannot be downloaded. TopGear
+challenges use the URL experience whenever the app is served on the TopGear host
+or the challenge belongs to the configured TopGear group, including when opened
+through `?tab=mine`. This takes precedence over missing or ZIP submission metadata.
+For other challenges, Work Manager's case-insensitive `submission_type=url`
 metadata selects the URL experience; every other value, including missing or
 malformed metadata, retains the standard ZIP experience. URL submissions
 reuse community-app's Topgear flow and exact Wipro instructions, submission
diff --git a/src/apps/opportunities/src/components/ChallengeSubmissionUpload.spec.tsx b/src/apps/opportunities/src/components/ChallengeSubmissionUpload.spec.tsx
index b0be02056..84b79c8be 100644
--- a/src/apps/opportunities/src/components/ChallengeSubmissionUpload.spec.tsx
+++ b/src/apps/opportunities/src/components/ChallengeSubmissionUpload.spec.tsx
@@ -25,6 +25,7 @@ import {
 const mockRecordAnalyticsEvent = jest.fn()
 
 jest.mock('~/config', () => ({
+    AppSubdomain: { topgear: 'topgear' },
     EnvironmentConfig: {
         TOPGEAR_ALLOWED_SUBMISSIONS_DOMAINS: [
             'wipro365.sharepoint.com',
diff --git a/src/apps/opportunities/src/pages/ChallengeDetailsPage.topgear-submission.spec.tsx b/src/apps/opportunities/src/pages/ChallengeDetailsPage.topgear-submission.spec.tsx
new file mode 100644
index 000000000..037627366
--- /dev/null
+++ b/src/apps/opportunities/src/pages/ChallengeDetailsPage.topgear-submission.spec.tsx
@@ -0,0 +1,149 @@
+/* eslint-disable import/no-extraneous-dependencies, ordered-imports/ordered-imports */
+import '@testing-library/jest-dom'
+import { fireEvent, render, screen, waitFor, within } from '@testing-library/react'
+import { MemoryRouter, Route, Routes } from 'react-router-dom'
+import { SWRConfig } from 'swr'
+
+import { ChallengeOpportunity } from '../models'
+import {
+    createChallengeSubmission,
+    createChallengeUrlSubmission,
+    getChallengeOpportunity,
+    getChallengeRegistration,
+    getChallengeSubmissions,
+} from '../services'
+
+import { ChallengeDetailsPage } from './ChallengeDetailsPage'
+
+let mockSubdomain = 'www'
+
+jest.mock('~/config', () => ({
+    AppSubdomain: { topgear: 'topgear' },
+    EnvironmentConfig: {
+        REVIEW_APP_URL: 'https://review.topcoder-dev.com',
+        get SUBDOMAIN(): string { return mockSubdomain },
+        TOPGEAR: { GROUP_ID: 'topgear-group' },
+        TOPGEAR_ALLOWED_SUBMISSIONS_DOMAINS: ['wipro365.sharepoint.com'],
+        URLS: {
+            TERMS_OF_USE: 'https://www.topcoder-dev.com/terms',
+            TOPGEAR_TERMS: 'https://topgear.topcoder-dev.com/challenges/terms/detail/topgear-terms',
+        },
+    },
+}), { virtual: true })
+jest.mock('~/libs/core', () => ({
+    recordAnalyticsEvent: jest.fn(),
+    useProfileContext: () => ({ initialized: true, profile: { handle: 'coder', userId: 123 } }),
+}), { virtual: true })
+jest.mock('~/libs/cms', () => ({}), { virtual: true })
+jest.mock('~/libs/ui', () => {
+    /** Renders a placeholder icon without loading the shared UI library; never throws. */
+    const Icon = (): JSX.Element => <svg />
+    return {
+        ConfirmModal: (): JSX.Element => <></>,
+        IconOutline: new Proxy({}, { get: () => Icon }),
+        LoadingSpinner: (): JSX.Element => <span>Loading</span>,
+    }
+}, { virtual: true })
+jest.mock('react-toastify', () => ({
+    toast: { error: jest.fn(), success: jest.fn() },
+}))
+jest.mock('../components', () => ({
+    ChallengeDescription: (): JSX.Element => <div>Requirements</div>,
+    ChallengeDetailHeader: jest.requireActual('../components/ChallengeDetailHeader').ChallengeDetailHeader,
+    ChallengeSidebar: (): JSX.Element => <aside />,
+    ChallengeSubmissionUpload: jest.requireActual('../components/ChallengeSubmissionUpload').ChallengeSubmissionUpload,
+    ChallengeTermsModal: (): JSX.Element => <></>,
+    extractTableOfContents: (): [] => [],
+    isHtmlDescriptionFormat: (): boolean => false,
+    OpportunityTabLoading: (): JSX.Element => <span>Loading submissions</span>,
+    ReportIssueModal: (): JSX.Element => <></>,
+}))
+jest.mock('../services', () => ({
+    createChallengeSubmission: jest.fn(),
+    createChallengeUrlSubmission: jest.fn(),
+    getChallengeAiReviewConfig: jest.fn(),
+    getChallengeForumTopics: jest.fn(),
+    getChallengeMemberResource: jest.fn(),
+    getChallengeOpportunity: jest.fn(),
+    getChallengeRegistration: jest.fn(),
+    getChallengeSubmissions: jest.fn(),
+}))
+
+const mockGetChallenge = getChallengeOpportunity as jest.MockedFunction<typeof getChallengeOpportunity>
+const mockGetRegistration = getChallengeRegistration as jest.MockedFunction<typeof getChallengeRegistration>
+const mockGetSubmissions = getChallengeSubmissions as jest.MockedFunction<typeof getChallengeSubmissions>
+const mockCreateUrlSubmission = createChallengeUrlSubmission as jest.MockedFunction<typeof createChallengeUrlSubmission>
+
+describe('Topgear submissions from the My Submissions deep link', () => {
+    beforeEach(() => {
+        jest.clearAllMocks()
+        jest.spyOn(window, 'scrollTo')
+            .mockImplementation(() => undefined)
+        mockCreateUrlSubmission.mockResolvedValue({ id: 'url-submission-id' })
+        mockGetRegistration.mockResolvedValue({ id: 'registration-id', memberId: '123' })
+        mockGetSubmissions.mockResolvedValue({ items: [], page: 1, perPage: 10, total: 0, totalPages: 0 })
+    })
+
+    afterEach(() => jest.restoreAllMocks())
+
+    it.each([
+        { groups: [], metadata: undefined, subdomain: 'topgear' },
+        { groups: ['topgear-group'], metadata: undefined, subdomain: 'www' },
+        { groups: [], metadata: [{ name: 'submission_type', value: 'zip' }], subdomain: 'topgear' },
+        { groups: ['topgear-group'], metadata: [{ name: 'submission_type', value: 'zip' }], subdomain: 'www' },
+    ])('submits a URL for a Topgear challenge: %j', async ({ groups, metadata, subdomain }: {
+        groups: string[]
+        metadata: ChallengeOpportunity['metadata']
+        subdomain: string
+    }) => {
+        mockSubdomain = subdomain
+        mockGetChallenge.mockResolvedValue({
+            currentPhaseNames: ['Submission'],
+            groups,
+            id: 'challenge-id',
+            metadata,
+            name: 'Topgear challenge',
+            phases: [{ isOpen: true, name: 'Submission' }],
+            status: 'ACTIVE',
+            track: 'Development',
+            type: 'Challenge',
+        })
+
+        render(
+            <SWRConfig value={{ dedupingInterval: 0, provider: () => new Map() }}>
+                <MemoryRouter initialEntries={['/opportunities/challenge/challenge-id?tab=mine']}>
+                    <Routes>
+                        <Route element={<ChallengeDetailsPage />} path='/opportunities/challenge/:challengeId' />
+                    </Routes>
+                </MemoryRouter>
+            </SWRConfig>,
+        )
+
+        await screen.findByText('You have no submissions yet')
+        expect(screen.getByRole('tab', { name: /^My Submissions/ }))
+            .toHaveAttribute('aria-selected', 'true')
+        fireEvent.click(within(screen.getByRole('tabpanel'))
+            .getByRole('button', { name: 'Submit a solution' }))
+
+        const urlInput = await screen.findByLabelText(/Submission URL/)
+        expect(screen.queryByLabelText(/Upload File/)).not.toBeInTheDocument()
+        expect(screen.getByRole('link', { name: 'TopGear terms and conditions' }))
+            .toHaveAttribute('href', 'https://topgear.topcoder-dev.com/challenges/terms/detail/topgear-terms')
+        fireEvent.change(urlInput, { target: { value: 'https://wipro365.sharepoint.com/sites/project/deliverable' } })
+        fireEvent.click(screen.getByRole('button', { name: 'Set URL' }))
+        fireEvent.click(screen.getByRole('checkbox', { name: 'I understand and agree' }))
+        fireEvent.click(screen.getByRole('button', { name: 'Submit' }))
+
+        await waitFor(() => expect(createChallengeUrlSubmission)
+            .toHaveBeenCalledWith(
+                'challenge-id',
+                '123',
+                'CONTEST_SUBMISSION',
+                'https://wipro365.sharepoint.com/sites/project/deliverable',
+                expect.any(AbortSignal),
+            ))
+        expect(createChallengeSubmission).not.toHaveBeenCalled()
+        expect(await screen.findByText('url-submission-id'))
+            .toBeInTheDocument()
+    })
+})
diff --git a/src/apps/opportunities/src/utils/challenge-detail.utils.spec.ts b/src/apps/opportunities/src/utils/challenge-detail.utils.spec.ts
index c147fdb59..70b2c0446 100644
--- a/src/apps/opportunities/src/utils/challenge-detail.utils.spec.ts
+++ b/src/apps/opportunities/src/utils/challenge-detail.utils.spec.ts
@@ -13,6 +13,7 @@ import {
 } from './challenge-detail.utils'
 
 jest.mock('~/config', () => ({
+    AppSubdomain: { topgear: 'topgear' },
     EnvironmentConfig: {
         ADMIN: { ONLINE_REVIEW_URL: 'https://software.topcoder-dev.com/review' },
         REVIEW_APP_URL: 'https://review.topcoder-dev.com',
diff --git a/src/apps/opportunities/src/utils/challenge-detail.utils.ts b/src/apps/opportunities/src/utils/challenge-detail.utils.ts
index 09e82626d..c39d888cc 100644
--- a/src/apps/opportunities/src/utils/challenge-detail.utils.ts
+++ b/src/apps/opportunities/src/utils/challenge-detail.utils.ts
@@ -6,12 +6,14 @@ import {
     ChallengeOpportunity,
 } from '../models'
 
+import { isTopgearChallenge } from './topgear.utils'
+
 export interface ChallengeSidebarLink {
     label: string
     url: string
 }
 
-/** Submission experiences selected by Work Manager challenge metadata. */
+/** Submission experiences selected by TopGear context or Work Manager metadata. */
 export type ChallengeSubmissionMode = 'url' | 'zip'
 
 /**
@@ -93,15 +95,17 @@ export function challengeMetadataValue(
 /**
  * Resolves whether a challenge accepts a URL or the standard ZIP archive.
  *
- * Work Manager persists this choice as `submission_type` metadata. URL mode
- * is deliberately opt-in: missing, malformed, and unsupported values retain
- * the established ZIP flow.
+ * TopGear challenges always use the URL flow, identified by the community host
+ * or configured challenge group. Other challenges opt in through Work Manager's
+ * `submission_type=url` metadata; all other values retain the ZIP flow.
  *
  * @param challenge raw Challenge API detail response.
- * @returns `url` only for an exact case-insensitive metadata value; otherwise `zip`.
+ * @returns `url` for TopGear or an exact case-insensitive metadata value; otherwise `zip`.
  * @throws Does not throw.
  */
 export function challengeSubmissionMode(challenge: ChallengeOpportunity): ChallengeSubmissionMode {
+    if (isTopgearChallenge(challenge)) return 'url'
+
     const value = challengeMetadataValue(challenge.metadata, 'submission_type')
     return typeof value === 'string' && value.trim()
         .toLowerCase() === 'url'